十二点英文怎么说怎么写

"12 o'clock" 表示12点钟。

"o'clock" 来自英语中 "of the clock" 的缩写，意思是“钟上的”。

例句：

"I'll meet you at 12 o'clock." (我会在12点钟和你见面)
"I usually have lunch at 12 o'clock." (我通常在12点吃午饭)
"The meeting starts at 12 o'clock sharp." (会议在12点整开始)