Engineers on the ground designed a way the astronauts could connect air-cleaning devices from the command module to the air system in the lunar module.

VOA: special.2009.07.22

Then he flung outward, feet first, with a swish, Kicking his way down through the air to the ground.

然后，纵身一跳，他两脚先伸出去，在空中乱踢乱舞，于是飕的一声，降落到地面。

耶鲁公开课 - 现代诗歌课程节选

But it had rows of seats like that, usually made over a hill or dug into the ground in some way.

但是观众席的结构很相似，通常建在山坡上或挖入地下。

耶鲁公开课 - 新约课程节选

It is a ground-up call to action that is forcing both parties to change the way that they are doing business, and that is beautiful."

VOA: special.2010.03.06

So, if we're talking about five different orbitals and we're talking about a ground state atom, we know that we just need to start at the bottom and work our way out up.

因此，如果我们要讨论的是,五个不同的轨道且是属于一个基态原子的话，我们知道，我们只需要从最低的轨道,开始一个一个往上找。

麻省理工公开课 - 化学原理课程节选

If the winter is not cold enough to freeze the ground, you can grow and harvest carrots the same way as during the summer months.

VOA: special.2009.02.24

And the challenge that we gave to ourselves is can we do that packaging in such a way that lays a ground work for community learning coming out of people who got involved in looking at the experiment of knowledge updates.

我们自己面临的挑战是,究竟能否,借用技术打包,为知识更新实验的,观看者的群体学习打下,坚实的基础。

麻省理工公开课 - 媒体、教育、市场课程节选

"What is necessary in this case is a collective effort, not only by the researchers and the people on the ground, but also the donor community, because controlling those two diseases can go a long way in improving people's food security and livelihoods in Sub-Saharan Africa."

VOA: special.2009.09.21

Take a stick, bang it into the ground, hang on that stick a captured helmet, - by the way please get up, thank you - a captured helmet, or a captured corselet, something that represents the military equipment that the losers had that were left on the field.

拿根棍子,插进地里,挂上一个缴获的头盔,-哦,快起来吧,谢谢你-,缴获的头盔,或者是缴获的胸甲,一些本归战败方所有,却被他们丢弃在战场上的军用装备

耶鲁公开课 - 古希腊历史简介课程节选