caesium clock

同根派生

英汉例句

• I didn't wake up until I heard the alarm clock.
  直到听到闹钟的铃声我才醒来。
• That clock is a family heirloom.
  那个座钟是祖传下来的。
• I set it by the clock on the railway station.
  我是按火车站的大钟对的。
• The clock ticks louder and louder in a quiet room.
  钟的滴答声在静静的房间里变得越来越响。
• The grandfather clock was back in its old place.
  落地式大摆钟已放回原处了。