原子核

The nucleus carries an amount of positive electricity equal to the negative electricity carried by all the flying electrons.

原子核带有一定量的正电，与全部飞行中的电子所带的负电相等。

Promethium is number 61 in the periodic table of elements and finds itself most useful in nuclear reactors as an alpha emitter.

钷是元素周期表中第61号元素，在原子核反应堆中作为阿尔法放射源。

The number of protons in the nucleus of an atom is referred to as the atomic number, or proton number, Z.

原子核内质子的数目即原子序数或称质子数，用Z表示。

Can nucleus consists only of nonstrange nucleons (strangeness quantum number S=0)?

原子核只能由无奇异性（奇异量子数S=0）的核子组成吗？

Each element has at least one isotope with unstable nuclei that can undergo radioactive decay .

每个元素至少有一个同位素不稳定原子核可以进行放射性衰变。

A thermal neutron is about to interact with a U-238 nucleus in an operating reactor core.

在一运转中之反应器心中，一热中子即将与U-238原子核发生反应。

Drift-II is more ambitious. If it works, it will be able to track such a recoiling nucleus through a device filled with gas.

而Drift-II的目标更加远大，如果可能，它可以在充满某种气体的装置中跟踪碰撞后的原子核。

A second method watches for another effect of the recoiling nucleus: ionization.

探测器使用的第二种方法，是观察反冲原子核的另一种效应：游离。

In this research , a mathematic model is built for coverting internal coordinates into rectangular coordinates and calculating nucleus distances, bond angles and bihedral angles in a molecule.

本研究课题建立了将分子中原子的自然坐标变换成直角坐标，计算任意两个原子的间距，求解任意三个原子核连线的夹角和任意四个原子构成的二面角的数学模型。

In this thesis, we give a review on RMF model systematically. Combining the quake effort on the meson field introduced by Quantum meson coupling model, we reconstruct the RMF model and investigate the basic property of some nuclei.

本文首先介绍了量子强子动力学理论，这个理论是在很多地方都有成功的应用，在 QHD 基础上，引入了考虑核内结构的夸克介子耦合模型，借鉴 QMC 中对夸克介子的成功耦合，本文改进相对论平均场理论，使其更精确的计算锂等原子核的基态性质，研究中子晕等现象。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。