A.M.用英语怎么说

"A.M." stands for "Ante Meridiem" in Latin, which means "before noon" in English. This term is used to indicate the time from midnight to noon in the 12-hour clock system.

Examples:

"I have a meeting at 9 A.M." (我有一个9点的会议)
"The store opens at 10 A.M." (商店在上午10点开门)

"P.M." stands for "Post Meridiem" in Latin, which means "after noon" in English. This term is used to indicate the time from noon to midnight in the 12-hour clock system.

Examples:

"The movie starts at 8 P.M." (电影在晚上8点开始)
"I usually go to bed at 11 P.M." (我通常在晚上11点睡觉)