曾经我问一屋子共进晚餐的客人们，有谁，感觉到被地球表面上的某个地方强烈的牵引着。
Once I asked a roomful of supper guests who, if anyone, felt any strong pull to any certain spot on the face of the earth.
热空气被牵引至地下管道，那里的水因为远离地表而总是很凉。
Hot air is drawn into the underground canal, where the water is kept cool because it is so far beneath the surface.
由于分子很容易被电离，通过纳米孔的电压落差有助于牵引dna穿过微孔。
Since the molecule is easily ionized, voltage drops across the nanopore help "pull" the DNA through.
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