off and的用法和样例：
例句
用作副词 (adv.)
- The powder ignited and suddenly puffed up.
火药着了火，忽然向上喷起来。 - And then all of a sudden I was going off the road!
可是忽然间，我的车朝着公路外边冲出去了。
词汇搭配
- on and off 断断续续地
- stand off and on 一忽儿接近海岸,一忽...
- play off and on with 一会戴上一会摘下...
- pack off bag and baggage 连人带随身东西一齐打...
- off and on 断断续续
