twice
adverb /twaɪs/
/twaɪs/
Idioms - two times; on two occasions
两次；两遍 - I don't know him well; I've only met him twice.
我跟他不熟悉，只见过两次面。 - The cows are milked twice daily.
奶牛每天挤奶两次。 - The cows are milked twice a day.
奶牛一天挤奶两次。 - They go there twice a week/month/year.
他们每星期／每月／每年去那里两次。 - a twice-monthly/yearly newsletter
半月／半年刊的简讯 - He managed to score twice in the match.
他设法在比赛中得了两分。 - The book has been turned into film at least twice before.
这本书以前至少被翻拍过两次。
- I don't know him well; I've only met him twice.
- double in quantity, rate, etc.
两倍 - an area twice the size of Wales
两倍于威尔士大小的地区 - Cats sleep twice as much as people.
猫睡觉的时间比人长一倍。 - At 56 he's twice her age.
他 56 岁，年龄比她大一倍。 - Charges have risen at twice the rate of inflation.
费用以两倍于通货膨胀率的速度上涨。
- an area twice the size of Wales
词源late Old English twiges, from the base of two + -s (later respelled -ce to denote the unvoiced sound); compare with once.
Idioms
lightning never strikes (in the same place) twice
- (saying) an unusual or unpleasant event is not likely to happen in the same place or to the same people twice
倒霉的事不可能在同一场所（或同一人身上）重复发生；一事不过二
once bitten, twice shy
- (saying) after an unpleasant experience you are careful to avoid something similar
一朝被蛇咬，十年怕井绳
once or twice
- a few times
一两次；几次 - I don't know her well, I've only met her once or twice.
我跟她不很熟，我只见过她一两次。
- I don't know her well, I've only met her once or twice.
think twice about something/about doing something
- to think carefully before deciding to do something
三思而行；慎重考虑后再决定 - You should think twice about employing someone you've never met.
雇用素不相识的人应三思而行。
- You should think twice about employing someone you've never met.
twice over
- not just once but twice
不只一次，而是两次 - There was enough of the drug in her stomach to kill her twice over.
她胃中的药物足够毒死她两次的。
- There was enough of the drug in her stomach to kill her twice over.