vt 划界;限制(form the boundary or limit of) [T+n， 通常pass]：The plantation is～ed by marsh.这种植园四周是沼泽地。The US is～ed on the north by Canada.美国北与加拿大接壤。The country is～ed by water/sea/woods on every side (all sides).这个国家四周环水/海/树林。Water～s the city on three sides.那个城市三面环水。Can you～the country? 你能说出这个国家的边界吗?〖同〗surround，enclose，encircle，border，edge，hedge;

n (1) 限界，止境 (the furthest limits of some kind) [pl]：keep within(go beyond/go outside) the～s of reason/sanity/decency/propriety不超出(超出/超出)理智/明智/体面/礼节的范围;keep one's temper/public spending within～s 控制脾气/公众消费;be beyond the～s of human knowledge超出人类知识的范围;be beyond the～s of coincidence决非巧合;(impudence/conduct) be out of/exceed all～s(粗野/行为)出了圈;put/set～s to one's spending限制开支;His greed (fury/joy/grief/ambition/love of money) knows no～s.他的贪婪(愤怒/快乐/忧郁/雄心/金钱欲)无止境。There were no～s to his foolishness. 他愚蠢以极。His foolishness was without～s.他极其愚蠢。It is within/not beyond/not outside the～s of possibility that... ……是有可能/不是不可能/不是不可能的。〖同〗limit，boundary，border;

(2) 边界(boundary)[pl]：(with)in the～s of a state/a park在国界/公园之内;out of～s(to sb)禁止(……)入内;(the captain's cabin) be out of～s to passengers (船长室)禁止乘客入内;(the bars) be out of～s to soldiers (酒吧)禁止士兵入内;(the dance halls) be out of～s to junior pupils (舞厅)禁止低年级学生入内;declare/place a cafe out of～s 把一咖啡馆宣布/列为禁地;

→′boundless adj 无限(穷)的;′boundlessly adv 无限(穷)地;′boundary n