| 词汇 | stand by |
| 词根词缀 | 词源： mid-13c., "to await, support," from stand (v.). As an order to hold one's self in readiness, it is recorded from 1660s. As a noun, it is attested from 1796, originally nautical, of a vessel kept nearby for emergencies. In reference to civil aviation, adj. meaning "without a booked ticket" is from 1961. 词根记忆： v. 支持,遵守,袖手旁观,准备行动A large group stood by and looked at the fire.很多人都对火灾袖手旁观. |
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