微秒

例句：

1. 1. The watch is accurate to within a microsecond.
   这手表的误差在微秒级别内。
2. 2.The scientist used a microscope to observe the microscopic details.
   科学家用显微镜观察微观细节。
3. 3.The clock was set to the nearest millisecond.
   时钟被设置到了最近的毫秒。