The method is more efficient than others because it adds two carbon atoms at a time, rather than one, to the hydrocarbon molecules being formed.
这种方法比其他的更有效，因为它向构造中的碳氢化合物一次引入两个碳原子而不是一个。
Obviously, if each unit of work were two, or ten, or one hundred times as large as a single string method call, then the proportion of time spent in thread overhead would be correspondingly small.
显然，如果每个工作单元都相当于单个字符串方法调用的两倍、十倍或一百倍，那么所花费的线程开销比例就相应地更小了。
However, this method has two shortcomings: (1) it ignores the time value of money and (2) it ignores the performance of the investments beyond the payback period.
然而，这一方法有两个缺点：(1)它忽略了货币时间价值(2)它忽略了项目回收期以后的经营业绩。
The theoretical analysis and numerical results of two typical examples show that this method can decrease the numbers of iterative by30%and reduce the computation time greatly.
两个典型算例的理论分析和实际计算表明，这种预条件方法可以降低方程的迭代次数约30%，明显减少方程求解时间。
According to the angle requirement for two ships position lines, this paper proposes the method to arrange the time to take the sun sight further than the one near the noon sight.
根据对船位线交角的最低要求，论述了在太阳移线定位中，以中天纬度线为参考，进一步安排中天附近以外观测太阳船位线所需时间间隔的估算。
Comparing these two learning methods, I prefer Xu Ge's learning method, because she can study well and enjoy herself at the same time.
比较这两种学习方法，我更倾向于许歌的学习方法，因为她能学习享受两不误。
In solving the mathematical model, two time-saving and effective numerical methods have been tested and compared with the finite difference method commonly used.
对动态数学校型的数值求解，试验了两种颇为有效的方法，并将这两种方法和常用的有限差分方法作了比较。
As an illustrated example, two typical forecasts in the time domain and the space domain are discussed. The applications of this method are explained by some supposed examples.
作为示例，着重讨论了时间域和空间域两种典型的预测类型，并通过设想的例子阐明了这种方法的具体应用。
And the method of calculating the proposed two new concept vehicles are put forward: Mitigation Brake should maintain a minimum speed and release time.
提出了两个新概念及计算方法：缓解列车制动时车辆全部缓解后应保持的最低速度及缓解时间。
In this paper, two optimal experiment points and optimized calculation method for experiment time are provided on the base of the principle of confidence field capacity minimality.
用置信域容积最小作为实验设计的原则，给出了两个最佳实验点的位置，为实验时间的长短给出了具体的优算方法。
Conclusion Two disinfection methods can both kill bacteria at appropriate temperature and time, but can't destruct antibody, and microwave method can save more time and energy.
结论两种消毒方法均可在相应温度和时间内杀灭细菌且不破坏抗体，但微波消毒法更节省时间和能源。
There are two ways of economic evaluation-dynamical and statical. Taking the time effect of money into consideration, the dynamical method conforms more to the objective laws of economy.
矿床经济评价方法有动态方法和静态方法两种，动态方法考虑了货币的时间因素，所以是符合客观经济规律的。
Under the same condition of vessel, tuber sealing method and drug using, the occurrence of phlebitis, block and disengage of tuber, retain time were observed between the two groups.
在相同的血管条件、相同的封管方法及近似药物使用的情况下，观察两组病人的静脉炎、套管堵塞、套管脱出以及留置时间。
Two typical numerical examples shoaled that the method is more general and requires much less calculation time to reach a desired accuracy.
两个典型的计算实例表明，本文提出的光线方程数值解法是一个较为普遍而节省计算时间的方法。
Sparse optical flow method was proposed for satisfying the requirement of real-time control and improving the efficiency of matching corresponding points in two im ages.
为了满足实时跟踪控制的需要，提高两幅图象之间对应点的匹配效率，提出了稀疏光流算法。
In this study, different appropriate pre-volatile time of two kinds of VCI film is investigated by weight-loss method and the effect of different pre-volatile time on antirust effectiveness o.
为考察预膜时间对防锈效果的影响，采用失重法研究了两种气相防锈膜的不同预膜时间，并借助盐雾箱腐蚀试验考察了不同预膜时间对其防锈效果的影响。
It is pointed out that the time domain method is a special case of those two methods and it is more efficient than those methods based on wavelet transform in case of obtaining the same result.
指出时域法是这两种方法的一种特例，并且具有更高的效率及相同的结果。
Based on the singular perturbation method and two time -scale decomposition, the flexible - link robot model is decomposed into two subsystems: the slow subsystem and the fast subsystem.
基于奇异摄动方法和两时标分解，柔性连杆机器人的模型分解成两个子系统：慢子系统和快子系统。
Compared with the original two kinds of Phase-Difference Correction, only one sequence of time-domain signal is sampled and FFT analysis of same points is performed twice in this method.
与原两种相位差法相比，这种方法只采一段时域信号，且进行两次相同点数的FFT分析。
The quantification of mitral stenosis by using a new color Doppler flow convergence method was evaluated, and compared with two -dimensional echocardiography, pressure half- time and combined method.
本研究应用彩色多普勒血流会聚新方法评价了对二尖瓣狭窄的定量诊断，并与二维超声、压力降半时间及综合法测量二尖瓣狭窄进行了比较。
There are two main technologies in time expression recognition:sequence labeling method based on machine learning theory and rule-based method.
时间表达式识别技术主要分为两类：基于机器学习的序列标注方法和基于规则的方法。
Photoelectric properties of two - dimensional photonic crystals of square lattice are calculated by finite different time domain (FDTD) method.
用FDTD方法计算了二维情况下正方形复式晶胞光子晶体的光子特性。
The ADI method requires two advanced time levels.
法需要两个超前的时间段。
Based on the method of SVPWM, various forms of phase voltage waveforms are generated by adjusting the duty time of the two zero vectors and the duty order of every vector.
在空间电压矢量形成PWM波的基础上，通过两个零矢量作用时间的不同分配及调节各矢量作用顺序，形成了不同形式的相电压波形。
In designing this compression method, it has compromised between two important factor: high compression ratio and fast run-time random access.
在设计该压缩方时，对两个重要参数进行了折衷：高的压缩率和快速运行时间随机访问。
The metol content and the hydroquinol content in developer solution were analyzed by potential spectrum method. During this analysis, two components were continuously titrated at the same time.
采用一种新的化学分析方法电位波谱法分析显影液中的米吐尔和对苯二酚的含量，在研究过程中实现了这两种成分的连续滴定分析。
The mutiple-solution phenomenon of steady transonic flow about two-dimensional plane cascade using the Time-Marching method for the Euler equations is examined.
本文用时间推进法求解欧拉方程组计算二维平面叶栅绕流问题数值实验是否有多重解现象。
Pulse tracer method was used to measure the residence time distribution (RTD) in Two-dimensional Three-phase circulating fluidized bed.
用脉冲示踪法对二维三相循环流化床液体停留时间分布(rtd)进行了测定。
Based on the nonlinear finite element method, the two-time method for form finding considering gravity is proposed and the related computing program is designed.
其次提出了以有限元法为核心的考虑索膜重力作用的二次找形法，编制了相应的程序。
Based on the nonlinear finite element method, the two-time method for form finding considering gravity is proposed and the related computing program is designed.
其次提出了以有限元法为核心的考虑索膜重力作用的二次找形法，编制了相应的程序。
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