英语语法分析

Every time you had one more proton, you had another element.

每发现多一个质子，就会多一种元素。

Only then can they hope to describe conditions at the Big Bang, when all space and time was compressed into a volume far smaller than a proton.

只有那样他们才能指望描述大爆炸的情况，所有的空间和时间全部在那时被压缩成一个远小于质子的体积。

Heavy water is heavy because the hydrogen in it weighs twice as much as ordinary hydrogen (it has a proton and a neutron in its nucleus, instead of just a proton).

重水之所以重是因为水中氢的重量是普通氢的两倍（它的原子核中有一个质子和一个中子，而不仅仅是一个质子）。