fineness of coin

例句：

1. 1. The watch has a fineness of 2400 vibrations per second.
   这手表的振动频率为每秒钟2400次。
2. 2. The engineer measured the fineness of the machine carefully before starting work.
   工程师在开始工作前仔细测量了机器的精密度。
3. 3. The new car has a fineness of 0.01mm, which is very precise.
   这款新车的精密度为0.01毫米，非常精确。