6:00a.m.用英语怎么说

"6:00 a.m." in English can be said as "six o'clock in the morning".

The term "o'clock" originated from the contraction of "of the clock", which was used to indicate the exact time on a clock face.

Examples in English:

I usually wake up at 6:00 a.m.
The first train leaves at 6:00 a.m.

Translations in Chinese:

我通常在6:00a.m.醒来。
第一趟火车在6:00a.m.出发。