I anticipate his arrival at four o 'clock.

我期待他4点钟到达。

《新英汉大辞典》

She said, 'I just want you to know: at four o 'clock today, I had to close down my foundation.'

她说，'我只是想让你知道：在今天下午四点钟，我不得不关闭了我的基金会。

youdao

You come at four o 'clock in the afternoon, then at three o 'clock I shall begin to be happy.

你下午四点钟来，那么从三点钟起，我就开始感到幸福。

youdao

She was nineteen. Those who knew Ida Tarbell in college say she would wake up at four o'clock in the morning to study.

VOA: special.2010.04.25

Mister Mindon looked at his watch. Four o'clock.

VOA: special.2010.05.29

Then, at four o'clock in the afternoon, twenty-four hours after the mortar fell on his friends and neighbors while they waited to buy bread, he will bend down and pick up his bow.

NPR: Excerpt: 'The Cellist Of Sarajevo'

Had you arrived from Mars at around four o'clock a couple of Saturdays back, you would have wondered what all the fuss was about.

BBC: Chick Young's view