at/on/in the same day三者有什么区别?请详细解释并举例说明。_百度知 ...答:表示时间的at, in, on:at表示片刻的时间,如:at 8 o'clock ,常用词组有:at noon, at night, at midnight, at the end of, at that time, at the beginning of, at the age of, at Christmas, at New Year等。in表示 一段的时间,如:in the morning, in the afternoon, in the ...