National boundaries are becoming increasingly meaningless in the global economy.
在全球经济中，国界已经变得越来越没有意义。
We would need their agreement to build outside the city boundary .
我们在市界以外的地方建房需要他们批准。
The stream curves round to mark the boundary of his property.
小河打了个弯，为他这块地划出了边界。
Anything that crosses the boundary of a black hole cannot get back.
任何物质只要跨越黑洞的界线就再也无法出来。
We walked through the churchyard towards the boundary wall .
我们穿过教堂墓地，向院墙走去。
The property’s boundary line is 25 feet from the back of the house.
这块地产的边界线在屋后25英尺的地方。