rip up 撕碎

If we wrote I think he would rip up the letter

如果我们写信的话，我想他会把信撕得粉碎。

2. Government debts are piling up, but so far low interest rates mean that they are cheap to service.

pile up 堆积;积聚

Problems were piling up at work.

工作中的问题越积越多。