twice
[ADV]
1. 两次
If something happens twice, it happens two times, or there are two actions or events of the same kind.
近义词
two times
双语例句
例：He visited me twice that autumn and called me on the telephone often.
那年秋天他来看过我两次，并经常给我打电话。
例：The government has twice declined to back the scheme.
政府已经两次拒绝支持该计划。
例：Thoroughly brush teeth and gums twice daily.
每天两次彻底清洁牙齿和牙龈。
2. 两次
You use twice in expressions such as twice a day and twice a week to indicate that something happens two times in each day or week.
双语例句
例：I phoned twice a day, leaving messages with his wife.
我一天打了两次电话，托他妻子捎口信。
3. 两倍
If one thing is, for example, twice as big or old as another, the first thing is double the size or age of the second. People sometimes say that one thing is twice as good or hard as another when they want to emphasize that the first thing is much better or harder than the second.
近义词
反义词
双语例句
例：The figure of seventy-million dollars was twice as big as expected.
7000万美元的金额是预计的两倍。
例：a report claiming that teachers could be twice as effective if they returned to traditional classroom methods.
声称教师若重新采用传统的课堂讲授方法授课效率会加倍的报告。
ADV. 副词
think twice
1. 重新考虑 , 谨慎考虑
If you think twice about doing something, you consider it again and decide not to do it, or decide to do it differently.
双语例句
例：From now on, think twice before saying stupid things.
从现在起，说蠢话前要三思。
PHRASE. 习语
1. 两倍
Twice the price, the average, the amount, etc. means double the price, double the average, double the amount, etc.
双语例句
例：Unemployment here is twice the national average.
这儿的失业率是全国平均水平的两倍。
PREDET. 前置限定词
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