计时

1. 定时器一种计时器，尤指控制时间间隔并指示间隔结束的那种计时器，如炉子上的计时器
   A timepiece, especially one used for measuring and signaling the end of time intervals, as on a stove.
2. 钟用来计时。
   A clock measures time.
3. 沙漏；滴漏用于计时的仪器，由两个玻璃盒组成，中由一细颈相连，盒内装有一定量的沙子，水银或其他流动物质，这些物质在一固定量的时间里，通常为一个小时，从上方的盒内慢慢流入下方的盒子中
   An instrument for measuring time, consisting of two glass chambers connected by a narrow neck and containing a quantity of sand, mercury, or another flowing substance that trickles from the upper chamber to the lower in a fixed amount of time, often one hour.
4. 计时学时间的科学测量
   The scientific measurement of time.

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时的英语翻译：