Hurry up or else you'll be late.

快点，否则你就要迟到了。

You are either a total genius or else you must be totally crazy.

你要么是个纯粹的天才，要不然你准是完全疯了。

This time we really need to succeed or else people will start giving us funny looks.

这次我们真地得要成功，否则人们会开始用奇怪的眼光看我们。

Evidently no lessons have been learned or else the government would not have handled the problem so badly.

显然没有吸取教训，否则政府不会把这个问题处理得如此糟糕。

"A hundred kisses from the Princess," said he, "or else let everyone keep his own!"

“我要公主亲自给我一百个吻，”他说，“否则双方不必谈什么交易了！”