draw off

基本解释

And that starts to tell us where to draw off How many screens do we need?
这开始启示我们从哪里去提取,我们需要多少屏幕？
The usual way of doing this is to insert a needle into the lump and draw off some cells.
普遍的做法是向这个肿块上插入一根针，然后取下来一些细胞。
As people present ideas and concepts at the meeting, simply draw off a branch from the sub-agenda items and write a main idea.
当人们在会议中提出看法和概念时，从次要议程中画出分支记下重点即可。

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
耶鲁公开课 - 生物医学工程探索课程节选

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