核裂变只能在某种类型的重核及不稳定核素内发生，如铀- 235及钚- 239。
Nuclear fission can only occur in some types of heavy and unstable nuclei such as in the uranium -235 and plutonium -239.
自不稳定核之间存在着锕系元素，包括钍和稳定核像灌了铅，铋，爆炸性事件，如超需出示锕。
Since the unstable nuclei exist between actinides, including thorium and stable nuclei like lead and bismuth, explosive events such as supernovae are required to produce actinides.
这么大的原子核不可能是稳定的，但在足够长的时间内，在真空附近组装一个原子核以观察真空的衰变是可能的。
A nucleus that large cannot be stable, but it might be possible to assemble one next to a vacuum for long enough to observe the decay of the vacuum.
这种原子通过释放射线从不稳定状态变到更加稳定的状态的过程被称为核衰减或放射。
The process by which an atom changes from an unstable state to a morestable state by emittingradiation is called radioactive decay or radioactivity.
除了提供伸缩性更好的环境之外，微核还能提供稳定性优势。
In addition to providing a more scalable environment, the microkernel can offer reliability advantages.
不出所料，在核问题上立场最不稳定的欧洲国家一直是德国，该国强大的工程技术与反核情绪在不安状态中长期共存。
The most labile European country on matters nuclear has, not surprisingly, been Germany, where great engineering and anti-nuclear sentiment have long coexisted uneasily.
为了寻找更稳定的方法来储存量子信息，Awschalom已经计算出一个电子的旋转与附近氮原子核旋转的的联系。
In search of a more stable way to store quantum information, Awschalom has now figured out how to link the spin of a electron to the spin of the nearby nitrogen's nucleus.
难以捉摸的量子力学表明，中子“太多”和“太少”有时会重叠出现，因而一些特定的元素没有稳定的同位素(或称变体，核内中子数不同)。
And the vagaries of quantum physics mean that "too many" and "too few" sometimes overlap, and there is thus no stable isotope (or variant, with fewer or more neutrons) of a particular element.
标准模型认为，原子中原子核的组成部分—质子是稳定不变的，但是许多后标准模型理论却不支持这种观点。
The Standard Model says that protons, which help make up the nuclei of atoms, are stable, but many post-Standard Model theories disagree.
这是特别有趣，因为当前的理论建议这些核不应该是稳定的，并且因此不存在。
This is particularly interesting, because current theory suggests that these clusters should not be stable, and therefore not exist.
空气核的稳定性极大程度地影响着水力旋流器的有效分离。
The influence of air core on separation performance of hydrocyclones was deeply analyzed.
基于再生核方法，温度分布的精确表达式和稳定的数值算法被给出。
The exact expression for the solution and stable numerical algorithm are given based on the reproducing kernel method.
中国的核设施、核活动始终保持安全稳定状态，特别是核电安全水平不断提高。
China's nuclear facilities and nuclear activities have all along been in safe and stable state and, in particular, the safety level of nuclear power stations has witnessed constant improvement.
目的研究稳定剪切流动对黏附于血管表面的白细胞及其细胞核变形的影响。
Objective To investigate the effects of steady shear flow on the deformation properties of an adherent leukocyte and its nucleus.
双低品质性状及不育性状的质核互作效应遗传性稳定。
The double low traits and male sterility of Ning A6 are stable.
非晶合金的稳定性是制备大块非晶合金的关键，而弛豫后形成的短程有序结构对非晶中的晶体相形核有重要的影响。
Stability of an amorphous alloy is a key for synthesizing bulk amorphous alloy, short range order formed after relaxation has important influence on nucleation of crystalline phase in amorphous.
目的：构建人死亡受体5 (DR5)真核表达载体，转染NS - 1细胞，建立稳定转染的NS - 1细胞系。
Objective: to construct eukaryotic expression vector of human death receptor (DR5) and transfect NS-1 cells to establish stable NS-1 cell line.
成熟木材细胞中的细胞核属于营养核，是一个稳定的特征。
Nuclei in mature xylem cells belong to nutritious nuclei and they are stable.
从核极限温度的角度研究了热核的热稳定性。
The thermal stability for hot nucleus is investigated based on limiting temperatures.
在带弱核的神经网络模型中，得到了分岔周期解稳定性准则。
Stability criteria for the bifurcating periodic solutions are derived in the neural network with weak kernel.
目的评价植入人工髓核柔性稳定一体化系统的颈椎节段的稳定性。
Objective To evaluate the stability mechanical functions of the anterior spine instrumentation system combing prosthetic disc nucleus with flexible stabilization devices.
证明当分布时滞的核函数取弱核形式时，平衡点是绝对渐近稳定的。
When the kernel function of the distributed delay takes the form weak kernel, the positive equilibrium is Absolutely asymptotically stable.
认为承压核是造成跃进式侵入和破碎角稳定的条件，跃进式侵入和破碎角稳定是承压核储能释放的结果。
The author believes that the bearing core is a precondition for leap-frog penetration and for maintaining the constant angle of fracture resulted from the release of the energy absorbed by the core.
当一个中子轰击一个原子核的时候，这个核可能会俘获这个中子，从而变的极不稳定。
When a neutron hits an atomic nucleus, the nucleus can absorb the neutron and become unstable.
目的探讨增殖细胞核抗原(pcna)的表达和细胞凋亡在人冠状动脉不稳定斑块中的作用。
ObjectiveTo investigate the roles of apoptosis and express ion of PCNA in human vulnerable atherosclerotic plaque.
目的探讨增殖细胞核抗原(pcna)的表达和细胞凋亡在人冠状动脉不稳定斑块中的作用。
ObjectiveTo investigate the roles of apoptosis and express ion of PCNA in human vulnerable atherosclerotic plaque.
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