八点钟

dà yuē bā diǎn zhōng wǒ bàn gōng shì de diàn huà líng xiǎng le

大约八点钟，我办公室的电话铃响了。

It was about eight o'clock when my office telephone rang.

zài dà yuē bā diǎn zhōng wǒ men kāi shǐ shàng dì yī jié kè

在大约八点钟，我们开始上第一节课。

At about eight o'clock, we start the first class.