There was a blackout at eight last night
八点───Eight o'clock;停电───power failure
Eight o'clock had already chimed.───已敲过八点钟了。
Wake up! It's eight o'clock.───醒醒吧！已经八点钟了。
By eight o'clock he had arrived at my hotel.───他八点前已到了我住的旅馆。
It might have been eight o'clock in the evening. As he was not acquainted with the streets, he recommenced his walk at random.───当时应已是晚上八点钟了，因为他不认识街道，他只得信步走去。
Harry and Hermione were all for it, so at eight o'clock that evening they hurried back to the Great Hall.───哈利和赫敏都赞成去，于是，晚上八点，他们又匆匆回到礼堂。
They got ready to leave by eight o'clock.───他们为八点钟动身作好准备。
I've been on the go ever since eight o'clock this morning.
I didn't leave the office until eight o'clock last night.
Please be here by eight o'clock at the latest.
He went by the eight o'clock train.
Wake up! It's eight o'clock.