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。

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

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另外，亦由于光学遮罩层是由第二族-第六族化合物半导体与陶瓷材料所构成，所以热稳定性佳。

Besides, because the optical shade layer is composed of second generation-sixth generation semiconductor compound and ceramic material, excellent heat stability can be realized.

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光学遮罩层是包括一第二族-第六族半导体化 合物及一陶瓷材料，光学遮罩层是设置于第一基板之上；

The optical shade layer, which is composed of a second generation-sixth generation semiconductor compound and a ceramic material, is positioned on the first basal plate;

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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

Here is an example that shows some very, very metallic elements, groups one and two, and some non-metallic elements over here, five, six and seven.

举个例子,这个例子表明金属元素，第一族和第二族，与一些非金属元素,在这里，第五族，第六族，和第七族。

麻省理工公开课 - 固态化学导论课程节选

All of these from the group one and two through the group five and six elements, but what about elements, what about molecules like hydrogen, or nitrogen, or maybe oxygen?

所有的这些都是来自于第一主族和第二组主族,到第五主族和第六组主族的悬殊，那么元素呢，比如氢气，氮气或氧气那样的分子呢？

麻省理工公开课 - 固态化学导论课程节选