You use perhaps to express uncertainty, for example, when you do not know that something is definitely true, or when you are mentioning something that may possibly happen in the future in the way you describe.
In the end they lose millions, perhaps billions.
最终他们损失了数百万,也许数十亿。
Perhaps, in time, the message will get through.
可能,过一段时间,这消息将会送到。
You use perhaps in opinions and remarks to make them appear less definite or more polite.
Perhaps the most important lesson to be learned is that you simply cannot please everyone.
或许最应吸取的教训是你不可能让每个人都满意。
His very last paintings are perhaps the most puzzling.
他最后的那些绘画作品也许是最令人费解的。
You use perhaps when you are making suggestions or giving advice. Perhaps is also used in formal English to introduce requests.
Perhaps I may be permitted a few suggestions.
也许能容许我提几条建议。
Well, perhaps you'll come and see us at our place?
呃,也许你会来我们住的地方看看我们?