twice

1. ADV If something happens twice, it happens two times, or there are two actions or events of the same kind. 兩次

He visited me twice that autumn and called me on the telephone often. 他那年秋天兩次來看我，并經(jīng)常給我打電話。

The government has twice declined to back the scheme. 政府已經(jīng)兩次拒絕支持該計劃。

2. ADV 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. 兩次[ADV 'a' n]

I phoned twice a day, leaving messages with his wife. 我一天打了兩次電話，留言給他妻子。

3. ADV 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. 兩倍[ADV 'as' adj/adv]

The figure of seventy-million dollars was twice as big as expected. 7千萬美元這個數(shù)字是預(yù)計的兩倍。

4. PREDET Twice is also a predeterminer. 兩倍[PREDET 'the' n]

Unemployment here is twice the national average. 這兒的失業(yè)率是全國平均數(shù)的兩倍。

5. PHRASE If you think twice about doing something, you consider it again and decide not to do it, or decide to do it differently. 三思

From now on, think twice before saying stupid things. 從現(xiàn)在起，說蠢話前要三思。

6. once or twice→see once

7. twice over→see over