| 释义 |
corund r.
- corundumn. 金刚砂，刚玉
- conundrumn. 谜,猜不透的难题,难答的问题
- conductorn. (乐队)指挥 售票员, 列车长 〈电〉导体
- coriandern. 芫荽,香菜
- 读、写、算dú _ xiě _ suàn
the three R's
- 每分钟转数měi fèn zhōng zhuǎn shù
revolutions per minute (r/m)
- 阴极射线管yīn jí shè xiàn guǎn
cathode-ray tube (CRT); cathode-ray lamp; C-R tube
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