You are a half hour late. -only a half hour?

你迟到半小时啦-才半小时吗？

youdao

Then they removed the cancer. The operation took only a half hour.

这次手术只用时一个半小时。

youdao

The band only played for about half an hour—it was a real sell.

乐队仅仅演奏了大约半个小时—真让人失望。

《牛津词典》

The operation took only a half hour.

VOA: special.2010.06.24

After only a half hour, he ended the meeting, saying a more extended discussion would be rescheduled.

WSJ: Decision to Dismiss McChrystal Came Swiftly

It has been only a half hour since he sat down beside the window, but already he feels a little bit better.

NPR: Excerpt: 'The Cellist Of Sarajevo'

But it is still a very dangerous drive, with many Lebanese saying they simply won't go past the town of Sidon, which in normal circumstances is only about a half hour drive south of Beirut.

NPR: On the Scene in Qana, Lebanon