At least it keeps the rain out.
至少它把雨水挡在外面。
In the lower atmosphere, pollutants like sulphur dioxide "rain out" of the air within days.
在大气层底部，像二氧化硫等污染物会随着下雨几天内就从空气中排出。
More to the point think of your eyebrows designed to keep dust and rain out of your eyes but very useful in sending signals to other people.
想想你的眉毛，更能说明这个问题，它是被设计来防止灰尘和雨水落入你眼睛里的，但在给他人传递信息方面，也很有用。
Take this umbrella. It can keep the rain out.
带上这把雨伞，它可以挡雨。
Close the Windows to keep the rain out.
关上窗户免得进雨。
This coat was supposed to keep rain out, but water has soaked through.
这件外衣说是能防雨， 但雨水照样透了进来。
This coat was supposed to keep rain out, but the water has soaked through.
这件外衣说是能防雨，但雨水照样渗了进来。
This coat was supposed to keep rain out, but the water has soaked through.
这外套应该是防雨的，可是雨水都渗进来了。
Congress amended the Clean Air Act that year to set up a market for the permits that power plants must have to release sulfur dioxide (SO2) -a major culprit in acid rain-out of their smokestacks.
美国国会修订空气清净法案，建立了二氧化硫(SO2)排放许可的市场，电厂都必须持有执照，才能从烟囱排出这种造成酸雨的元凶。
Perhaps in the past there was a "rain-out" provision where advance ticket holders could get a refund if the weather was bad.
或许过去有“遇雨取消”的规定，如果天气不好预售票持有者可以退票。
Perhaps in the past there was a "rain-out" provision where advance ticket holders could get a refund if the weather was bad.
或许过去有“遇雨取消”的规定，如果天气不好预售票持有者可以退票。
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