Owls sleep by day and work at night.
貓頭鷹白天睡覺晚上工作。
There will be occasional showers during the day.
白天將偶有陣雨。
He is seldom at home during the day.
他白天很少在家。
You can see stars by night, but not by day.
你在夜晚可以看到星星，白天卻看不到。
He has been working all day.
他已工作了一整天。
The eggs began to decompose after a day in the sun.
雞蛋在太陽下放了一天后開始變壞。
The milkman comes every other day.
送牛奶的.人每隔一天來一次。
He is the man of the day.
他是時下的風云人物。