prep (1)在(某段时间或距离)内(inside or not beyond the limit of time or distance)：be there～the last week 上个星期一直在那儿; see sb ten times～the past hour 在过去的一小时里见了某人10次; finish the work～the next few days 在以后的几天内完成工作; He'll arrive～an hour/return～several days. 他一个小时就到/三四天就回来。W～minutes I was called to his office. 不出几分钟，我就被叫到他办公室去了。be～a short distance 在很短的距离内;～shouting distance/a mile of the town 在喊声听得见的距离/离城一英里的距离内; catch a car～five kilometres 在五公里的行程内追上了一辆汽车; The climber got to～20 meters of the top of the mountain. 登山者登到离山顶不到20米的高度。

(2)在……的范围或限度内(in the sphere or not beyond the limitation of)：～sight/earshot 在看得见/听得到的范围内;～one's reach/one's grasp 在自己够得着/抓得到的范围内;～the medical profession 在医务界内;～one's power/one's jurisdiction/one's rights to do sth 在自己做某事的权力/权限/权利范围之内; act～the law of the land 在土地法的范围内操作; keep～the law/their budget 不超出法律/他们的预算范围; live～one's income 量入为出;The examination is well～her ability/her capacity. 此次考试完全在她的能力范围之内。This secret must stay～the family. 这个秘密不准家人以外的人知道。The news must be kept～this house. 这消息不能传出这间屋子。the dominant role～the family 在家里的主导作用; It ensured a balance of forces～society. 它确保了社会各种力量的平衡。There are serious differences of opinion～the party. 党内存在着严重的意见分歧。We were told to work～the system. 我们被告知须在该体制下工作。The 5% price rise is well～the limits set by the government. 价格上涨5%完全在政府规定的范围之内。

(3)在(某处)之内(inside a place)(fml)：W～the walls of this house lies a secret. 在这所房子里有一个秘密。～the castle walls/the medieval walls of the city 在该城堡的围墙/中世纪建造的城墙以内; The prisoners demanded the freedom to congregate～the prison. 囚犯们要求在监狱里有集会的自由。The children must remain～the school grounds during the lunch break. 午饭休息时间，孩子们只能在校区内逗留。live～the area 生活在该地区; a prison～a prison 牢中之牢;a play～a play 剧中之剧; A mounting wave of dislike and anger rose～me. 一种不断加剧的厌恶及愤怒的情绪涌上我的心头。

adv 在(到)内部(inside)(fml)：the hatred he felt～他从内心感到憎恶;Waiters required/wanted～. 招聘服务生。Apply/Enquire～.请进来洽询。She cut open the fruit and began to suck out the soft flesh～. 她切开果实开始吮吸里面软软的果肉。One dog stayed outside the house at night while the other was kept～. 晚上一只狗守在屋外，而另一只被关在屋里。The door was suddenly opened～. 门突然从里面打开。〖同〗inside;〖反〗outside;

n在里面，内部(inside)[U]：an attempt to reform the system from～从体制内部进行改革的尝试; Membership is by nomination from～. 会员资格由内部提名。Seen from～， the house is spacious. 从里面看，这个房子很宽敞。〖同〗inside;〖反〗outside;

【辨异】within 与 inside 的区别见INSIDE。