However, after the experiment described above the difference in time between the two clocks was less than a billionth of a second, which is why very accurate clocks were needed.
但是经过上述实验后，两个钟表的时间差距不到十亿分之一秒，所以需要用两个非常精准的钟表。
Dates and Times provides a broad spectrum of date manipulation functionality, including calculating the difference between two dates and retrieving the local system current date and time.
DatesandTimes提供了大量的日期操作功能，包括计算两个日期之间的差，以及检索本地系统的当前日期和时间。
Now they do say in the paper "It is worth stressing that this measurement does not rely on the difference between a start (t0) and a stop signal but on the comparison of two event time distributions."
他们的确在论文中提到“值得注意的是这一测量并不依赖于开始(t0)与结束信号之间的时间差，而是取决于两个事件的时间分布。”
Now try and not blink for 30 seconds at a time for two minutes. Do you feel any difference?
现在尝试一下每次30秒内不眨眼，坚持两分钟，感觉到差别了吗？
Within two years after putting this new performance measurement system into place, his department accomplished 2, 700 on-time projects-a night-and-day difference.
但在新制度执行的两年多里，该部门按时完成了2700件项目——翻天覆地的变化，不是吗？
Researchers plan to follow patients for up to two years to determine if there's a weight difference over time.
研究人员计划对患者进行为期两年的随访，以确定研究前后是否存在体重的差异。
Results:There was no significant difference for operative time, blood losses, 72 h postoperative haemoglobin as well as the need for transfusion therapy between the two groups.
结果：两组患者在手术时间、失血量、术后72小时血红蛋白计数及输血需要方面没有统计学差异。
There's virtually no lag time, and there's no drastic difference in pressure if two or more faucets are open simultaneously.
不会有延时，当两个水龙头同时打开的时候也不会感到水压明显的不同。
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。
Results Comparing with the total treatment efficiency and average defervescence time of the two groups, there exists distinct difference (P<0.01).
结果：治疗总有效率和平均退热时间，两组比较均差异非常显著（P<0.01）。
The numerical results show that the two linearized difference schemes of the article improve the accuracy of the space and time direction and shorten computation time largely.
数值结果表明，本文建立的两个线性化差分格式提高了时间方向和空间方向的精度，大大缩短了计算机的运行时间。
What's the time difference between the two places, Miss?
小姐，这两个地方的时差是多少？
There was no significant difference between the two groups at the coronal level (P>0.05) as well as preparation time (P>0.05).
在根管口段，两组间无显著性差异（P>0.05）。 两组间根管预备时间无统计学差异（P>0.05）。
Generally speaking, males and females under these two statuses of employment showed very slight difference in terms of the amount of leisure time being enjoyed.
可以说在这两种状态下，男性与女性的闲暇时光相差甚微。
Results: There's no statistically significant difference between the rate of root resorption of two methods, but there's statistically significant difference between the treatment time.
结果：两种治疗方法的牙根吸收率差异没有显著性；但是治疗疗程差异有显著性。
By using backward difference of space-time intensity correlation function with respect to time delay, the two-dimensional velocity vector of a moving diffuser can be measured.
利用远场时变散斑空-时强度相关函致的有限差商可以测量散射体运动的二维速度矢量。
There was no significant difference in the extubation time between two groups.
术后气管拔管时间两组无明显区别。
The phase difference between the two sources is gradually drifting with time.
两个源的位相差随时间逐渐移动。
Analysis of two groups of patients' consciousness recovery, operation time, intraoperative blood loss, hospital stay, the difference of epilepsy.
分析两组患者意识恢复、手术时间、术中出血量、住院时间、癫痫的差别。
There was no significant difference in the average recovering time of blood glucose between two groups.
结果：两组均可使血糖明显下降，血糖达标时间无显著性差异；
RESULT: there were no obvious difference (P>0.05)between these two kinds of methods in treatment, but the number of operation field and the time of hospitalization is quite different (P<0.05).
结果：两种方法在疗效上无显著差异（P>0.05），但手术野数目和住院时间存在显著差异（P<0.05）。
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。
Results The once-only stuffing successful rate, symptoms during stuffing and night sleeping time of the two groups have significant difference( P< 0.01).
结果两组患者的一次填塞成功率、填塞期间症状、夜间睡眼时间间差异均有显著性意义（P<0.01）。
RESULTS There was no significant difference in hemodynamic and HCT at every time point between the two groups.
结果各时点血流动力学、血红蛋白、红细胞压积两组病人无明显差异。
Results The operation and intubation time of the two groups showed no significant difference.
结果两组患者手术时间及带管时间无显著差异。
Calculates the time difference between two marked points.
计算出两个时间点之间的时间。
This paper presents a new dependence difference inequality test algorithm for two-dimensional arrays, and proves that the time complexity of the algorithm is polynomial.
给出了二维数组的体差不等式测试算法，并证明二维数组的体差不等式测试算法具有多项式时间复杂度。
By the view of space and time in the Relative Theory of Narrow Sense, discuss the two confusing physical concept; observe and survey, and analyse the difference between them.
通过狭义相对论的时空观讨论观察与观测这两个易混淆的物理概念，分析两者之间存在的差别。
By the view of space and time in the Relative Theory of Narrow Sense, discuss the two confusing physical concept; observe and survey, and analyse the difference between them.
通过狭义相对论的时空观讨论观察与观测这两个易混淆的物理概念，分析两者之间存在的差别。
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