?1. 意思：指十五小時整點，即24小時制下的下午3點鐘。

How to read: [?θ??ti?f?v]

Usage: Used to indicate the time of day, specifically 3 o'clock in the afternoon in a 24-hour clock system.

Example sentences:

1. It's already fifteen o'clock, we should start heading home.

現(xiàn)在已經(jīng)是十五點了，我們應(yīng)該開始回家了。

2. The meeting is scheduled for fifteen hundred hours, don't be late.

定于十五時開始，不要遲到。

3. We'll meet at fifteen hundred hours in front of the coffee shop.

我們將在咖啡店門口見面，時間是十五時。

4. The train will depart at precisely fifteen o'clock, so make sure you're on time.

火車將在十五點整準(zhǔn)時發(fā)車，所以確保你準(zhǔn)時到達(dá)。

5. I always take a break at fifteen hundred hours to have some tea and snacks.

我總是在十五時休息一下，喝點茶吃些小吃。

Synonyms and usage:

1. Three o'clock: another way to say "fifteen o'clock" in a 24-hour clock system.

2. Three PM: used in a 12-hour clock system to indicate 3 o'clock in the afternoon.

3. 1500 hours: military time used to indicate 3 o'clock in the afternoon.

Editor's summary:

In summary, "fifteen o'clock" refers to 3 o'clock in the afternoon in a 24-hour clock system. It is often used as a formal or military way of indicating time and can be replaced by "three o'clock" or "three PM" in a 12-hour clock system. It is important to pay attention to the context and use the appropriate time format when referring to a specific time of day.