在白天 用英语怎么说

by day, during day,by daylight,in the daytime
在白天

diurnal animals are active during the day;
昼行性动物是在白天活动的
diurnal flowers are open during the day and closed at night.
白日花是在白天开放、晚上关闭的。
You can' t see them in the daytime
在白天，你看不见他们。

during the day
或者
in daytime

in the daytime

or

in the morning

at the morning

on the morning

During the day

In the daytime

Daytime