这个珠江三角洲畔籍籍无名的城市，制造了全世界30%用于硬盘驱动器的录音磁头，全球16%的电子键盘。

This little-known city in the Pearl River delta makes 30% of the magnetic recording heads used in hard drives across the world and 16% of the world’s electronic keyboards.

youdao

And then we have a triple bond there because we have 3 pairs of electrons.

然后那里还有一个三键,因为我们有三对电子。

麻省理工公开课 - 化学原理课程节选

So it looks a lot less messy if we just draw our Lewis structure like this for h c n, where we have h bonded to c triple bonded to n, and then a lone pair on the nitrogen there.

这看起来整洁了不少,如果我们把氰化氢的路易斯结构画成这样的话，这样我们就有氢与碳之间的单键和碳与氮之间三键，然后还有一对孤对电子在氮这里。

麻省理工公开课 - 化学原理课程节选

When you are done you have three electron pairs in bonding orbitals.

当你完成的时候,成键轨道上共有三对电子。

麻省理工公开课 - 固态化学导论课程节选