vertimeter

例句：

1. 1. The engineer used avertimeter to check the accuracy ofthe new machine.
   工程师使用一个计时器来检查新机器的准确性。
2. 2. The clockon the wall is asimple but accurate vertimeter.
   墙上的钟是一个简单但准确的计时器。
3. 3. The doctor measured her blood pressure witha vertimeter before prescribing medication.
   医生用一个计时器测量了她的血压，然后开药。