V to cause (a liquid) to flow from something 使(液体 )倾泻
Draw off your gloves and wash your hands.
摘掉你的手套洗洗手。
The villagers had to draw off because of the flood.
由于洪水的缘故,村民们不得不撤走。
In fact, you don't have to draw it this complicated way, you could just draw it as a line with and hanging off of it, and you would know that that's a DNA molecule four bases long.
实际上你不必画的这么复杂,你只要画几个线条并标明连接的碱基,别人就能知道它是含四个碱基的DNA
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