解析：boundary界线;边界。例如，the boundaries of the country ，国界。界限;范围。例如：the boundaries of knowledge 知识范围。
Restriction限制。例如：restrictions for hunters对猎人实施的限制。a restrictionagainst smoking in schools 禁止在学校吸烟 。
confinement (被)限制, (被)禁闭, 产期, 分娩。近义词imprisonment
limit, restrict, confine这三个动词的一般含义为“限制”或“局限”。
limit 指时、空、程度、量等方面的“限定”，其内涵是如果超出了这种限度就会受罚或遭到令人不快的后果;此外，这个词也常用来表示“局限” This driver received a ticketbecause he failed to limit his speed while driving in heavy traffic.
那位司机收到了一个违章通知单，因为他在车辆多的地方没能限制开车速度。
I limited myself to two modest ambitions. to do physical exercises every morning andto read more of an evening.
我把自己的决心限制于两项小小的抱负：即每天早晨做体操，常在晚上多读一点书。
He seems to have only a limited intelligence.
似乎他的智力有限。 We must limit our expense to what we can afford.
