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gene
基因
例句：
The geneticists were not interested in particular genes until recently.
直到最近，基因学家们才开始对特定基因感兴趣。
blunder upon…
偶然碰上……
例句：
yesterday I blunder upon an old friend I hadn"t seen for several years.
昨天我偶然碰上了一个几年没见面的老朋友。
Don"t jump to conclusions.
不要急于下结论。
对话：
A: This book isn"t worth reading.
B: Don"t jump to conclusions. you should at least skim through it.
A: Maybe you are right.
A：这本书不值一读。
B：不要急于下结论。你至少应该浏览一下。
A：也许你说得对。