| 词汇 | knock up |
| 词源 | knock up. In England to knock up has been standard English for “to arouse by knocking at the door” or “to visit” since at least 1663, when Samuel Pepys, in his Diary, recorded consta- bles knocking him up. In American slang, however, to knock up has since about 1920 meant to make a woman pregnant, usually outside of marriage. |
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