| 单词 | knock on a door |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔knocker〕A hinged fixture, such as a metal ring or bar, used for knocking on a door.门环：供敲门用的有铰链的固定物，比如金属环或杆美国传统〔rat-a-tat-tat〕A series of short, sharp sounds, as that made by knocking on a door.咚咚声：一连串短而尖的声音，例如敲门声美国传统 |
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