• adv. 两次；两倍

twi-,二，-ce,副词后缀。

twice

twice: [12] Twice was formed from Old English twige ‘twice’ (itself based on twi-, the combining form of two) and the genitive ending -s, which was used for creating adverbs, such as always, nowadays, once, thrice, etc.
=> two

twice (adv.)

late Old English twies, from Old English twiga, twigea "two times," from Proto-Germanic *twiyes (cognates: Old Frisian twia, Old Saxon tuuio), from PIE *dwis-, adverbial form of *dwo- "two" (see two). Spelling with -ce reflects the voiceless pronunciation.

Life is as tedious as a twice-told tale
Vexing the dull ear of a drowsy man.
["King John," III.iv.]

Think twice, then speak was an "old Prouerbe" by 1623. At twice, though less common than at once, means "at two distinct times; by two distinct operations."

1. 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。

来自柯林斯例句

2. They are in twice daily radio contact with the rebel leader.

他们每天用无线电和叛军首领联系两次。

来自柯林斯例句

3. The legislation has twice been rejected by the House of Lords.

该法规已经两次遭到上议院的否决。

来自柯林斯例句

4. Liam surprised his tutors by twice failing a second year exam.

利亚姆两次都没能通过大二的一门考试，这让他的导师们很吃惊。

来自柯林斯例句

5. I phoned twice a day, leaving messages with his wife.

我每天打两次电话，托他妻子捎口信。

来自柯林斯例句