Also, things like the damming of rivers has caused increased sediment production, not to mention the addition of more carbon dioxide and methane in the atmosphere.
此外,河流筑坝等工程也增加了沉积物的产量,更不用说大气中二氧化碳和甲烷的增加。
It thundered into space perfectly, pushing an unmanned Apollo spacecraft more than eighteen thousand kilometers up into the atmosphere.
VOA: special.2009.07.08
The New Criticism, incontestably and without rival, created an atmosphere in which it was okay to notice that things were a little more difficult than they'd been supposed to be.
新批评派,无可厚非,创造了一种很好的风气,大家似乎都能欣然接受,那些看起来还比较复杂的东西。
It expands. You change your constraints on your system, you heat it up some more, then you take the heat source away, and you put it back in contact with the atmosphere. And you cool it a little bit, change the constraints, cool it a little bit more, and heat, and you've got a closed cycle engine.
让它与大气接触冷却,改变约束,使它继续冷却,然后又再次加热,这就是循环热机,我们以前也研究过,更复杂的机器。
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