This says, if you want to be in the air for a long time, so you may think that 90 degrees is the best angle.

也就是说,如果你想在空中停留更久,你也许会认为 90°是最佳选择

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that whatever it is, it's going to be delicious, because of the delicious aroma in the air.

不管他们做的是什么，肯定很美味，因为空气中漂浮着食物的诱人香味。

What kind of 课堂 - SpeakingMax英语口语达人

But it can be acquired in the air, from patients that are from- from other individuals that are infected.

天花会通过空气传播,通过病人和其他感染者呼出的空气传播

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I've already suggested that in a variety of ways this is a response that can be naive but it is still very much in the air.

我已经暗示过，在各种各样的方式里,这个是一种天真的响应，但是仍然有很多这种声音存在。

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It's going to take place in there. It's going to be a constant pressure, it might be open to the air, or even if it isn't, there might be plenty of room, and it's a liquid anyway, so the pressure isn't going to change significantly.

也许它是液体，它在这个位置,这是恒压的，它也许是连通大气的，就算不是，它也有，足够的空间，而它是液体,压强不会显著地改变。

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That means, if you are going in a plane and you throw something up in the air, it seems to be going up and down to you.

也就是说,如果你在飞机中,你向空中扔出一物体,它也许会相对于你上下运动

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