| 释义 |
Preto, R.
- prestoadj. 迅速的 adv. 赶快
- Pretorian. 比勒陀利亚[南非（阿扎尼亚）首都]
- preteritn. 过去时态 adj. 过去的
- 读、写、算dú _ xiě _ suàn
the three R's
- 阴极射线管yīn jí shè xiàn guǎn
cathode-ray tube (CRT); cathode-ray lamp; C-R tube
- 絮凝反应xù níng fǎn yīng
flocculoreaction; F. R.
- 每分钟转数měi fèn zhōng zhuǎn shù
revolutions per minute (r/m)
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