I had just enough time to finish eating before the bell rang and I was off to my first class.
我在铃响前刚好有时间吃完，然后就去上第一节课了。
《柯林斯英汉双解大词典》
2
My schoolmates watched time crawl every afternoon, waiting an eternity for the three o'clock bell.
我的同学每天下午都盯着时间流逝，永远地等待着三点钟的钟声。
3
This often proves difficult and can take a long time so I will ring a bell so that everyone knows it's time to eat! Hopefully this will speed things up a bit.