at 2 o'clock sharp
会议在两点整开始。
The meeting starts at 2 o'clock precisely.
《牛津词典》
两点整！够守时吧！
Two o'clock on the dot! How's that for punctuality!
你的表肯定慢了。我的表是两点整。
Your watch must be slow. It's two sharp by my watch.
youdao
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