Actually, what that would say, and we are going to see more about that so not very important right now, but what we would see is that for a close surface we would end up getting zero for the flux.

也就是这样了，现在来看点没那么重要的东西，对于一个封闭的曲面，如果通量为零。

youdao

Because when you're up on that point, you see anything that's in the water and anything close to the surface.

因为当你在那里的时候，你可以看到水里的任何东西和贴近水面的一切。

youdao

Manatees, aquatic mammals inhabiting Florida's rivers and coastal waters, swim close to the surface and are frequently killed in collisions with boats.

海牛是生活在佛罗里达河流和沿海水域的水生哺乳动物，它们游到海面附近，经常在与船只相撞时被撞死。

youdao

I don't believe we'll-- I'll--come close to scratching the surface of what I would enjoy doing, by the time I've died.

我不能相信-,我能推测死时,自己会对什么感兴趣。

耶鲁公开课 - 死亡课程节选

because when you're up on that point, you see anything that's in the water, anything close to the surface and,

因为当你站在那里的高处，你能看到贴近水面的一切，而且，

圣莫尼卡之景点 - SpeakingMax英语口语达人

is very close to its surface a kind of anal-phase parable.

和那种肛门期的寓言很像。

耶鲁公开课 - 文学理论导论课程节选

They are especially vulnerable because they swim slowly and close to the surface.

BBC: Tagging whale sharks in the Maldives

It is also showing where particular animals prefer to stay close to the surface, and where they prefer deeper waters.

ECONOMIST: Oceanography

Significantly, most of the potash resource lies relatively close to the surface at depths between 800 to 2, 000 feet below ground.

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