n.外延过宽，过度伸展

Any users of credit may overextend themselves. 每个贷款使用者都有可能作出不自量力的事。

Don't overextend your stay in Europe. 不要在欧洲逗留得太久。

Don't overextend yourself in the process. 不要一个人承担太多的任务。

We would be back to our historical cycle of exuberant overextension and sulking isolationism. 我们就会回到历史上洋洋自得的过份开发和阴郁沉闷的孤立主义时期，从而周而复始下去。

Although it does look promising, be careful not to overextend yourself or you will lose in the long run. 虽然看上去很有希望，但是不要过分扩展自己，否则最终可能获得失败。