10:39 in Engpsh can be expressed as "ten thirty-nine" or "ten thirty-nine AM/PM" .
The first way, "ten thirty-nine" is the way to express time in the format of hours and minutes, it comes from the traditional way of reading the clock.
The second way, "ten thirty-nine AM/PM" is the way to express time in the 12-hour clock format, it comes from the system of measuring a full day into two periods: the period that runs from midnight to noon (AM stands for ante meridiem) and the period that runs from noon to midnight (PM stands for post meridiem).
Examples:
"I will meet you at ten thirty-nine."
"Please be on time, the meeting starts at ten thirty-nine AM."
中文翻译:
"我会在十点三十九分见你。"
"请准时到,会议在上午十点三十九分开始。"