You must submit your claim within a reasonable time.
你必须在适当的时间内提出要求。
It seems only reasonable to ask students to buy a dictionary.
要学生买一本词典，好像也没什么不合情理。
I made them a reasonable offer but they turned it down flat.
我向他们提出一个合理建议，但是他们断然拒绝了。
Public spending must be kept within reasonable bounds.
公共开支必须控制在合理的范围内。
There's a reasonable prospect that his debts will be paid.
有理由相信他会偿还债务的。