1560s, originally a name for a sharp or cheat, "who deceived tradesmen by substituting empty boxes for others full of money" [Robert Nares, "A Glossary of Words, Phrases, Names, and Allusions," London, 1905]. As a type of toy, it is attested from 1702.
实用例句
1. Jack had attended these meetings as a matter of routine for years.
数年来，杰克把参加这些会议当成是例行公事。来自柯林斯例句
2. Auntie Hilda and Uncle Jack couldn't fuss over them enough.
希尔达姨妈和杰克姨父对他们宠爱有加。来自柯林斯例句
3. Jack took out his notes and talked for just under an hour.
杰克掏出他的笔记，讲了将近一个小时。来自柯林斯例句
4. An American judge yesterday dismissed murder charges against Dr Jack Kevorkian.
昨天一个美国法官驳回了对杰克·凯沃尔基安医生的谋杀指控。来自柯林斯例句
5. "It's not that I don't believe you, Meg," Jack said, unconvincingly.
