| 词汇 | overhead |
| 词根词缀 | 词源： 1532, "above one's head" (adv.), from over + head. The adj. is attested from 1874. As a n., short for overhead costs, etc., it is attested from 1914. 词根记忆： a. 在头顶上的;架空的ad.在头顶上The plane flew overhead.飞机在头顶上飞. |
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