electric stopwatch

• 电气秒表

electric stopwatch的用法和样例：

例句

1. Stopwatch is a typical digital circuit.
   秒表是一种典型的数字电路。
2. His staff of experts, each armed with clipboard and stopwatch, studied individual workers with a view toward eliminating unnecessary movement.
   他的专家组每人配有带弹簧夹子的书写板和秒表用来研究每个工人，使他们不能偷懒。