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）。

youdao

There are no footprints, no type tracks and no heavy machinery like a bulldozer…Nothing was ever brought in to move these heavy rocks.

没有脚印，没有履带，也没有推土机之类的重型机械……没有任何东西被带来用以搬过这些重石头。

youdao

Imagine that the pig has a heavy collar and to reward the pig for walking forward, you might remove the heavy collar.

想象这头猪戴着很重的项圈，作为对这头猪向前走的奖励，你可以把沉重的项圈拿掉。

youdao

The easiest way to get the rest of the oil out is to place heavy rocks on the crushed material.

VOA: special.2009.09.29

This is all really a very unfortunate and heavy burden to place on this fascinating little library of writings from late antiquity.

这就将不幸的重担强加给了这个,收藏近古时期作品的迷人的小文库。

耶鲁公开课 - 旧约导论课程节选

I used to listen to a lot of hip-hop music and heavy metal when I was younger.

我年轻的时候，我常常听一些嘻哈和重金属音乐。

What kind of实战 - SpeakingMax英语口语达人

They state that young people should be heavy in stocks and old people heavy in bonds.

FORBES: The Flight Path Approach to Age-Based Asset Allocation

This is the sole casino in the Big Easy, and gets a heavy, heavy convention crowd.

FORBES: Online Woes Send Poker Players Back to the Felt

And then, once you like heavy metal, you are going to die listening to heavy metal.

CNN: Iron Maiden to rock Brazil ... again