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1·An isotope of hydrogen with mass number greater than 1; deuterium or tritium.

原子质量数大于1的氢的同位素；氘或氚。

2·Chemical element is the general term for the same type of atoms with the same mass number.

化学元素是具有相同核电荷数的同一类原子的总称。

3·Search the site to find in-depth information for the mass number of animals present all over the world.

搜寻网站上找到大规模的动物数量目前在世界各地的深度信息。

4·Bosons include mesons, nuclei of even mass number, and the particles required to embody the fields of quantum field theory.

玻色子包括介子、偶质量数的原子核以及体现量子场论中的场所需要的粒子。

5·A radioactive isotope of cobalt with mass number '0 and exceptionally intense gamma-ray activity, used in radiotherapy, metallurgy, and materials testing.

钴的一种放射性同位素，质子数' 0，具有异常强烈的伽马射线作用，用于放射疗法、冶金和材料测试。

6·For the mass number of web pages needed to be crawled, how the information crawling system gets more web pages with good quality effectively, is related to the system performance.

信息采集系统需要采集的页面数量非常浩大，如何有效地采集到高质量的网页关乎系统性能。

7·Such current disturbs the zero out-put basic line of the light mass number region, so that it's very difficult to measure and record the height of spectrum peaks of the light mass number region.

这种电子流对轻质量部分质谱的零输出基线起干扰作用，致使这部分谱峰的峰高不能很好地测量和记录。

8·All the isotopes of a given element have the same number of protons, but differ in their number of neutrons, and hence in their atomic mass.

给定元素的所有同位素都含有相同的质子数，但它们的中子数不同，因此它们的原子质量也不同。

9·I had gained weight in the form of muscle mass, but thinking only of lowering the number on the scale, I altered my training program.

肌肉量增大，我的体重就增加了，但因为只想着降低体重称上的数字，我改变了训练计划。

10·The number of mass shooting in the US has quickly increased in recent years.

近年来，美国的大规模枪击事件迅速增加。