We should try to buy more time.
buy more time 字面意思是：“买更多的时间”，这个短语的正确意思是：“争取时间、拖延时间”。因此，当美国人说"We should try to buy more time."时，他/她要表达的意思就是:"We should try to gain more time."、"We should try to stall for time."、"We'd better adopt a stonewalling strategy."。
Jane: What's the matter with Mike? He is about to make presentation in ten minutes, but where is he?
Shirley: Call him immediately. And anyway, we should try to buy more time.
①The manager just called that he would arrive in a moment.
②There must be something fishy behind it, and we must check it out here.
③The deadline is coming but we haven't finished this task.
④Our computer will be fixed in no time, but I hate to go back work.
1. stall vi. 拖延
The Social Democratic Party has vowed to try to stall the bill until the current session ends.
Thomas had spent all week stalling over his decision.
Every time I ask her to set the date she stalls.
2. stonewall vt. 拖延，阻碍
The administration is just stonewalling in an attempt to hide their political embarrassment...
He did his best this week to stonewall questions and to block even the most modest proposals.