Youwillfailunlessyouworkhard.
如果你不积极工作,就会失败.
Let'shavedinnerout—unlessyouaretootired.
咱们出去吃饭吧——除非你太累了.
Substanceshavenotendencytoexpandunless(theyare)heated.
除非受热,物质不会有膨胀的倾向.
Iwillbeveryangryunlessyouhavealreadyspokentoher.
除非你已经对她说过了,否则我会很生气.
Don'taskmetoexplainunlessyoureallydon'tunderstand.
不要叫我解释,除非你真的不懂.
Unlesspayingbycreditcard,pleasepayincash.
如果不用信用卡付账,就请付现金.