The US-Mexico border is the most frequently crossed border in the world and is almost 2,000 miles long.
美墨边界是世界上人员过往最频繁和一条，其长度几乎达2000英里。
A car stuck on the border fence between the US and Mexico. Photo: AFP / US Customs and Border Protection
今日小常识
今日短语
当什么事情或人 drive you up the wall 的时候，就是说这件事情或人快把你给逼疯了，让你非常烦恼和生气。
例句
This computer is really driving me up the wall; it keeps crashing!
Shopping for jeans drives her up the wall. She can never find a pair that fit her.
You are driving me up the wall! Will you stop singing that awful song now?
请注意
另一个字面上很相似的短语是 climbing the walls, 此短语用来形容某人非常紧张，担心或者是感到无聊。
I've been sitting at home waiting for the phone to ring all day - I'm climbing the walls.
