You’ll have to go now, otherwise you’ll miss your bus.
你现在得走了,否则就赶不上公共汽车了。
Thanks for your directions to the house; we wouldn’t have found it otherwise.
谢谢你为我们指明去那所房子的路,否则我们是找不到的。
There was some music playing upstairs. Otherwise the house was silent.
楼上有音乐声,除此之外房子里很安静。
Unless otherwise assigned a seat by the teacher, I always chose to sit at the back of the classroom.
除非老师另外指定一个座位,否则我总是坐在教室的后面。
I can’t meet you on Sunday. I’ll be otherwise occupied / engaged (= doing sth else).
我星期日不能见你了,我有别的事要忙。