within表示状态时还可作“在…内心里”解; 表示环境时作“在(某组织、团体等)的成员当中”解; 表示数目时作“不超出”解。

There are two long rivers within the continent.这块大陆有两条长河。
He has grown three inches within the last two years.这两年的工夫他长高了三英寸。
Mr.Smith lives within ten miles of us.史密斯先生住在离我们不到十英里远的地方。
She was determined to live within her income.她决心量入为出。
It is within our power to reward him for that.我们有权为那件事奖赏他。
It built up a state of tension within themselves.那使他们心里十分紧张。
There are serious differences of opinion within the medical profession.在医务界存在着严重的意见分歧。
He is keeping within a few yards of his sister's chair.他同他姐姐的椅子保持两三码的距离。

within, in
这两个介词均可表示“在…(时间)以内”。within着重一段时间终结之前,用于正式场合; in着重一段时间的过程,常用于重复动作或延续动作。
within, inside
参见inside条。

within还可用作副词,意思是“在内, 在里面, 在屋内；在内心”。例如：
The house has been painted within and without.房子内外都油漆过了。

［词源］＜中古英语withinne(在…里面)