Twice a week

两次───twice;每周───weekly

He was pinned against the fence by a boy twice his size; he could hardly breathe.───他被一个身材两倍于他的男孩按在篱笆上, 喘不过气来.

In the face of a severe crisis relating to international reserves, the government devalued the currency twice.───面对国际储备的严重危机, 政府实施了两次货币贬值.

You shall not serve me that trick twice.───不许你再像那样捉弄我了.

The car passed over the body twice, once backward and then forward.───那辆车把那人来回轧了两次，先是倒着轧的，再是往前开着轧的。

Refuse is collected twice a week.───垃圾每周收两次.

The government has twice declined to back the scheme.───政府已两次拒绝支持该方案.

I was absent once or twice.───我曾缺席一两次.

To ensure a good crop the soil had to be turned over twice.───要保证收成好,地要翻耕两遍.

Once bit [bitten] twice shy.

Opportunity never knocks twice at any man's door.

A fault denied is twice committed.

Visit your dentist twice a year for a check-up.

Once a man and twice a child.