Now, remember, the formation of the ionic bonds was from group one and group two, and over here with group six and seven.

现在请记住，离子键的形成,从第一族和第二族元素，与六七主族的元素相互构成的。

麻省理工公开课 - 固态化学导论课程节选

We have got an extensive subway system and an extensive bus system that we have had for 60, 70 years.

我们有大规模的地铁系统和巴士系统，它们已经有差不多六七十年的历史了。

纽约的公共交通 - SpeakingMax英语口语达人

So let me first say a little bit about the story line, and some of the themes at the beginning of Exodus, the first six or seven chapters.

首先再让我大概介绍一下故事，以及在《出埃及记》开篇中的一些主题，开始的六七章。

耶鲁公开课 - 旧约导论课程节选

You know, people are doing six and seven bands, you know,

有些人搞六七个乐队，

作为一名音乐家 - SpeakingMax英语口语达人

and they last me, six or seven months.

而且可以让我穿上六七个月。

SOHO的画廊 - SpeakingMax英语口语达人