| 词汇 | drop |
| 词根词缀 | 词源： drop (n.) O.E. dropa, from P.Gmc. drupon, from PIE *dhreub-. Meaning "lozenge, hard candy" is 1723. The verb (O.E.) originally meant "fall in drops;" transitive sense "allow to fall" is mid-14c. Related: Dropped; dropping. Drop in the bucket (late 14c.) is from Isa. ix.15 [K.J.V.]. Exclamation drop dead is from 1934; as an adj. meaning "stunning, excellent" it is first recorded 1970. At the drop of a hat "suddenly" is from 1854; drop-in "casual visit" is 1819; drop-kick is 1857. 词根记忆： n. 滴;落下;微量v.落下;下降;失落The temperature suddenly dropped to zero.气温突然下降到了零度. |
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