Definition
During the daytime; when there is natural light.
在白天；于白天的时间。
I prefer to travel by day, so I can enjoy the scenery along the way.
我喜欢在白天旅行，这样可以欣赏沿途的风景。
This street is extremely busy by day, filled with cars and pedestrians.
这条街在白天非常繁忙，充满了车辆和行人。
By day, the park is full of children playing and people strolling.
白天时，公园里满是玩耍的孩子和散步的人。