abbr.ohne kosten (German=without cost) (德语)不计价,不受约束,ola kala (Greek=all is fine,all is good) (希腊语)都很好(古代希腊水手最早使用),outer keel 外(平板)龙骨
His doctor wouldn't OK the trip.
医生不会同意他去旅行。
OK. Now, let's talk some business.
好了,我们现在言归正传吧。
I shouted out "I'm OK"
我大声喊道“我没事”。