它们实在太好了，目前尚不宜用。
不宜用黑色，因为它让人联想到死亡。
Black was considered inappropriate because of its associations with death.
哪个场合不宜用齿轮传动?。
明天我们按理应该去看看玛丽，但是我认为我们不会去（此句不宜用should）。
We ought to go and see Mary tomorrow, but I don't think we will.
在日常会话中我们不宜于用太多的大字。
We should not use too many big words in our everyday speech.
其攻者，猛药也，不宜轻用！
The attack, the potent medicine also, unfavorable light use!
其攻者，猛药也，不宜轻用！
The attack, the potent medicine also, unfavorable light use!
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