| 释义 |
r.f
- refabbr. 裁判（等于referee）；参考（等于ref...
- RFabbr. 无线电频率（radio frequency）
- RFCabbr. 请求注解（Request For Comme...
- RAFabbr. Royal Air Force 英国皇家空军
- 不必bú bì
need not, not have to f
- 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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