y day:在白天,日间,白天里
例句：Watch her sparkle by day as the sun shines on her architectural perfection.
看她的闪光白天太阳照在她的建筑的完美.
No transport system in the world carries so many passengers by night or by day.
世界上没有一个运输系统能这样日夜兼程地运送如此多的乘客.
The pillar of cloud by day and the pillar of fire by night did not depart from before the people.
日间,耶和华在云柱中领他们的路；夜间,在火柱中光照他们,使他们日夜都可以行走.