核子

The theoretical prediction of large energy gap exists near the neutron number~44 and proton number~38-40 are also compared and discussed.

许多理论预测在中子数N~44，而质子数Z~38-40 附近，存在大的能隙，而我们研究的几个原子核，其核子数恰好位在此能隙附近，所以文中也针对此变形位障所预测的幻数加以讨论。

In the chiral SU(3) quark model, we use the coupling between quarks and nonet scalar meson fields and nonet pseudo-scalar meson fields to describe the medium and long range interactions, and use one gluon exchange to describe the short range interaction. In the extended chiral SU(3) quark model, besides the nonet pseudo-scalar meson fields and the nonet scalar meson fields, the coupling between vector meson fields and quarks is also considered, the short range interaction can be dominately described by vector meson exchange. We investigate the nucleon-hyperon interaction in the extended chiral SU(3) quark model and study the S-wave phase shifts of N-Λ and N-Σ systems. Comparing to the results in chiral SU(3) quark model, we find that the short-range interaction could be described either by the one-gluon exchange or vector meson exchange.

在手征SU(3)夸克模型中，用夸克与标量介子九重态和赝标介子九重态场的耦合来描述中长程相互作用，单胶子交换来描述短程相互作用，推广的手征SU(3)夸克模型是在原来手征SU(3)夸克模型的基础上进一步引入了夸克和矢量介子九重态场的耦合，主要由矢量介子交换来描述短程相互作用，在推广手征SU(3)夸克模型下研究了核子－超子相互作用过程，计算了N-Λ和N-Σ相互作用的S波散射相移，通过和手征SU(3)夸克模型的结果比较，发现N-Λ和N-Σ系统的短程相互作用既可以由单胶子交换来描述，也可以由矢量介子交换来描述。

The idea that humanity is limited to the use of Coal, Oil, Natural Gas, and Nuclear Fission to supply its energy needs is a matter of POLICY, and not a matter of FACT.

这与人类受限使用的煤、油、天然气及核子分裂所提供的能量是政策方针的问题，并不是实际的问题。

I tried to take in what he was saying about nuclear fusion, but most of it went over my head.

我努力想搞懂他说的核子融合，但大多数对我来说太难了。

He finds it hard to keep pace with all the developments in nuclear physics.

他发现要赶上核子物理学上所有的发展很难。

If we were ignorant of the structure of the atom, it would be impossible for us to study nuclear physics.

如果我们不知道原子的结构，我们就不可能研究核子物理学。

A: I'm studying nuclear physics, and you

我正在读核子物理，你呢

This book provides a good approach to nuclear physics .

本书提供学习核子物理学的好方法。

He has an immense grasp of nuclear physics.

他对核子物理学有极深的了解。

When people start talking about nuclear physics, i'm out of my depth .

当人们谈起核子物理学，我就茫无所知了。

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％。