bounds
n[pl]
1 limits 界限: keep within/go beyond the bounds of reason, sanity, decency, propriety, etc 有[没]理性、理智、体统、礼貌等
It is not beyond the bounds of possibility (that...). (...)不是不可能的.
Are there no bounds to his ambition? 他的野心难道没有止境吗?
Public spending must be kept within reasonable bounds. 公共事务的开销必须保持在合理的范围以内.
2 (idm 习语) know no bounds => know. out of `bounds (to sb) (US off limits) (of a place) not to be entered or visited (by sb) (指某地方)禁止(某人)入内; 谢绝(某人)参观
The town´s pubs and bars are out of bounds to troops. 军人不得进入城里的酒馆和酒吧.