by 在这句话的用法?
问题描述：
by 在这句话的用法?
请问下面这句话 by 的用法是?
I can see by my watch,without taking my hand from the left grip of the cycle.
答
这里的by是介词,意为“按照,根据”
例如：
It's 5 o'clock by my watch.我的手表显示现在5点.
play by the rules 按规则比赛