If you think that someone is fair and sensible you can say that they are reasonable.
He's a reasonable sort of person.
他是那种通情达理的人。
If you say that a decision or action is reasonable, you mean that it is fair and sensible.
a perfectly reasonable decision.
一个完全合理的决定。
At the time, what he'd done had seemed reasonable.
他所做的在当时看来似是合理的。
reasonable grounds for complaint.
合理的投诉理由。
If you say that an expectation or explanation is reasonable, you mean that there are good reasons why it may be correct.
It seems reasonable to expect rapid urban growth.
看起来期待城市会飞速发展是有道理的。
There must be some other reasonable answer.
一定还有其它的合理答案。
If you say that the price of something is reasonable, you mean that it is fair and not too high.
You get a good meal for a reasonable price.
你无需花费过多就能好好吃一顿。
You can use reasonable to describe something that is fairly good, but not very good.
The boy answered him in reasonable French.
那男孩用还算流利的法语回答了他的问题。
A reasonable amount of something is a fairly large amount of it.
They will need a reasonable amount of desk area and good light.
他们将需要摆放桌子的大片空地和充足的光线。