precaution   n.预防,防备,警惕
[例]She took every precaution but still got a bad deal on that used car.
她处处小心但还是在旧车交易中受骗。
premature a. 1.比预期(或正常)时间早的 2.(做法等)不成熟的,仓促的
[例]I had been a little too premature in coming to this conclusion.
作出这样的结论, 我有点太草率。