"Have lunch at twelve o'clock"
"Twelve o'clock" 这个短语来自于英式时钟，它代表着正午12点。
例句：
I'll meet you for lunch at twelve o'clock.
(我将在十二点与你见面吃午饭。)
Let's grab a bite to eat at twelve o'clock.
(让我们在十二点吃点东西。)
It's time for lunch, let's go eat at twelve o'clock.
(是午饭的时间了，让我们在十二点吃。)