1. The rats had been conditioned to ring a bell when they wanted food. 这些老鼠已经过训练,想吃食物时就会按铃。
2. 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. 事实证明这很困难并可能需要很长时间,所以我会提醒每个人,是时候吃东西了!希望能加快速度。
3. That might ring a bell. 那也许敲响了警钟。
4. Does that ring a bell? 有没有帮你想起一些什么呢?
5. If I were to add the word pigmy, ring a bell? 如果我加上词,矮人,听起来熟悉吗?