The supply of oil can beshut off unexpectedly at any time, and in any case, the oil wells will all run dry in thrty years or so at the present rate of use.
石油供应可能会随时意外中断；不管怎样，以目前这种消费速度，只需30年左右，所有的油井都会枯竭。
2
The schoolboy was glad to beshutof math class this morning.
这个学生今天上午逃了数学课感到很高兴。
3
The chain reaction that actually runs the reactor can beshut off in a matter of seconds.