比如在火星上，为了在长期任务中对抗这些影响，宇航员肯定需要人为制造重力。

To counter these effects on a long-duration mission, say, Mars, astronauts will certainly need to create their own artificial gravity.

youdao

最近对古玛雅水资源管理的研究发现，一些城市的城市建筑被用来分流降雨径流到相互连接的水库的重力补给系统中。

Recent studies of ancient Maya water management have found that the urban architecture of some cities was used to divert rainfall runoff into gravity-fed systems of interconnected reservoirs.

youdao

宇宙中存在着比我们所能看到的更多的物质，而这些物质的重力将所有的东西都聚集在一起。

There is more stuff in the space than we can see, and that the gravity of this stuff is holding everything together.

youdao

You know, if you want to measure the potential energy of something in a gravitational field, you have to define the zero somewhere, right, because it's arbitrary. You can set it anywhere you want. It's the same with enthalpy.

你知道，如果你想测量重力场,中某种东西的势能，你需要，在某处定义一个零点，对吧？,因为势能的值是任意的,你可以把它设定在。

麻省理工公开课 - 热力学与动力学课程节选

We live in a gravitational field and that it affects our day to day life, and if you have hip pain or a hip that's diseased in some way, and you can't stand up against that gravitational field in the same way, that severely limits what you can do in the world.

我们生活在一个重力场中,这个场影响着我们的日常生活,如果你的髋关节疼痛,或者有其他髋关节疾病的话,就不能像平常一样,站在这个重力场中了,这严重限制了人的活动能力

耶鲁公开课 - 生物医学工程探索课程节选

Conversely, if you get an answer and it doesn't seem to make sense, then you've got to go back and ask, am I violating some of the assumptions, and here you will find the assumption that the particle had that acceleration a is true as long it's freely falling under gravity but not when you hit the ground.

反过来说,如果你得到一个结果,发现似乎是错的,那么你就应该回过头来问问自己,我是不是违反某些前提了,这个模型中,你就发现,只要质点在重力作用下自由下落,质点具有加速度a的前提是正确的,但是落地后就不成立了

耶鲁公开课 - 基础物理课程节选