You can trap any signal in this way and it can be a good way of ensuring that a program that crashesout is caught and trapped effectively and reported.
可以通过这种方式跟踪任何信号，而且也能很好地确保捕获并有效地跟踪和报告程序崩溃的情况。
2
These just fade out on shallow beaches, so the whale doesn't hear an echo and it crashes onto the shore.
这些声音在浅滩上逐渐消失，所以鲸鱼没有听到回声，就撞到了岸边。
3
If - no, make that when - your PC's hard drive crashes and can't be read, don't be too quick to throw it out.