| 单词 | tier |
| 释义 | tier n. 1. a row or rank or unit of a structure, as one of several placed one above another (tiers of seats). 2. Naut. a a circle of coiled cable. b a place for a coiled cable. Derivatives tiered adj. (also in comb.). Etymology: earlier tire f. F f. tirer draw, elongate f. Rmc |
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