- 酒杯來到嘴唇邊，得飲與否未可知；物未到手前，未能算己有；凡事難以十拿九穩。
Many a slip(many things fall) between the cup and the lip
- 逢人且說三分話，未可全拋一片心。
All truth is not always to be told.
- 此事結果如何尚未可知。
It still lies in the womb of time.
- 當你有病之際，趕快寬恕你的仇人吧，因為你可能復原也未可知。
When you are ill make haste to forgive you enemies, for you may recover.
- 前途未可限量
have a brilliant future
- 也許，大概，也未可知，說不定，據我所知
for aught I know
- 關於基因遺傳的模式尚未可知.
The exact mode of genetic transmission is unknown.
- 蘇格蘭人會受到重視也未可知，假使幼時便被抓起來的話。
Much may be made of scotchman, if he had been caught young.