[kě yǐ]
(表示可能) can; may
You may well say so.
你完全可以这么说。
Can I borrow two books at a time?
我可以一次借两本书吗?
[口] (好; 不坏) passable; pretty good; not bad
She has a passable knowledge of Japanese.
她的日语(知识)还可以。
[口] (利害) awful
What a sharp tongue she has got!
她那张嘴真可以。