1 in a period not longer than a particular length of time 在某段时间内:
I'll be back within an hour.我一小时内回来。She got married, found a job and moved house, all within a week.她结了婚,找到了工作,搬了家,这一切都发生在一个星期内。
2within sth (of sth) not further than a particular distance from sth 在某距离内:
The house is within a kilometre of the station.房子离车站不到一公里的地方。
3 not outside the limits of sb/sth 在某范围内:
Each department must keep within its budget.每个部门的开支都必须维持在预算以内。
4 (formal 正式) inside sb/sth 在…内:
The anger was still there deep within him.他内心深处仍然很生气。