An electron has a negative charge,a proton has a positive charge.

电带负电荷,质带正电荷。

The neutrons and protons form the core of the atom.

中和质成核。

The nucleus of an atom consists of neutrons, protons and other particles.

核由中、质和其他粒成。

Antihydrogen formation in the laser-assisted positronium-antiproton collision is investigated in the first Born approximation.

在一级玻恩近似下，研究在激光辅助的电偶素-反质碰撞中的反氢合成。

Electrons are negatively charged with electricity,protons are positively charged.

电是带负电荷的,质是带正电荷的。

Hydrogen transfer, protonization and formation of methene bridge are probablely the main reasons for the above structural characters.

氢转移、质化、亚甲基桥的形成可是导致这些结特征的主要因。

The nuclide chart involves electron, positron, antiproton, antineutron, photon to exhibit the symmetry of mass and charge ideally.

该核素图电、正电、反质、反中和光收录在内，完美地表现质和电荷的对称性。

That achievement came at the Bevatron accelerator at Lawrence Berkeley National Laboratory, by smashing protons into a piece of copper.

在美国劳伦斯柏克莱国家实验室的贝伐加速器（Bevatronaccelerator）里，以质撞击铜片便可以办得到。

After they absorb energy, the nuclei release or reradiate this energy so that they return to their initial state of equilibrium.

之后，质再次释放以回到初始时的平衡状态。

The rearrangement of acetone oxime in the Beckmann solution involves three acetic acid molecules and one proton (present as an oxonium ion).

模拟表明，有三个乙酸分和一个质（以氧鎓的形式纯在）参与反应。

With a systematic study on the effects of ionophores and ion channel on the photopotential signals, this paper verified ike nonproton ion translocation in Purple Membrane.

本文通过在介质中加入离载体或离通道剂对紫膜的光电响应信号进行系统的研究。结果表明:上述光电位信号的差异主要是由紫膜的非质离的迁移引起的。

Methyl thioacetate was prepared by using acetyl chloride and methyl mercaptan as starting raw material in this paper.The yield of product is 69.3%.Itcan be used in seasoning flavor.

对可用于各种调味香精的食用香料硫代乙酸甲酯的合成进行初步研究，产率达到693％，对所合成的产品做红外光谱分析和质核磁共振分析，确定其化学结。