The day has eyes, the night has ears.
若要人不知，除非已莫为
"If you would not be known to do anything, never do it"
若要人不知,除非己莫为
"If you don't want people to know about it, don't do it"
"若要人不知,除非己莫为"
What is done by night appears by day.
若要人不知，除非己莫为。
Everyone should give up this type of enjoyment, unless some emergency matter with no alternative happens.
要让大家放弃这种享受，除非是发生了莫些不得已的紧急事件。
Don't worry there will be no friend on the road ahead; who in this world does not recognize you?
莫愁前路无知已,天下谁人不识君
If there's a heaven on earth, this is it!
人间若有天堂, 非此莫属!
If there is a heaven on earth, this is it !
人间若有天堂，非此莫属！
The nocturnal visitor, ignorant of the fact that the count had removed the staples, might now think himself at home, and pursue his purpose with full security.
那位午夜的访客因为不知道伯爵已把搭扣除掉，以为自己现在已很安全，就泰然自若地开始起来。
Do not share any information about your hacking projects with anyone but those you would trusted.
不要将已破解的任何资料与人分享，除非此人绝对可以信任。
Students should not expect renewal unless specifically assured of it.
除非已经得到特别的保证，学生千万不要以为资助会继续下去。
Don't leave the building unless instructed to do so.
除非接到通知，不要离开这幢大楼。
Not enjoyment, and not sorrow, /Is our destined end or way: /But to act, that each tomorrow /Find us father than today
莫寻苦，莫放纵，人生不为此二端，要图有为要实干，日日长进天地宽
He never speaks much, unless among his intimate acquaintances.
他从来不爱多说话，除非跟知已的朋友们谈谈。
Do not make sexual advances unless you are given the mating signal.
除非得到信号，否则不要发生性行为.
Don't attatch yourself easily to a man except that he loves you truely and dearly, and besides, he deserves your love.
不要招惹别人的男人，除非你非常非常爱他，并且，他非常非常值得爱。
"But no outsider can appreciate their subtle qualities, and I doubt whether you will really understand their meaning. "
"若非个中人,不知其中之妙.料尔亦未必深明此调."
Do not share any information about your hacking projects with anyone but those you‘d trust.
不要将你已破解的任何信息与人分享，真正黑客，除非此人绝对可以信赖。