So essentially, we have two ethene or ethylene molecules here to start with where these blue are our 2 s p 2 hybrid orbitals, so you can see that for each carbon atom, one is already used up binding to another carbon atom.

本质上，我们从两个乙烯分子开始,蓝色的是2sp2杂化轨道，你可以看到，对于每一个碳原子，其中一个已经用来和另外一个碳原子成键。

麻省理工公开课 - 化学原理课程节选

"Within all those pictures, I came across these two little blue boxes, " she recalled.

CNN: The enduring fascination of the Sharon Tate murder

Even outside of these two banking blue chips, there will be plenty of other opportunities to make money on Spanish banks in the year ahead.

FORBES: For a Year-End Rally, Look to Spanish Banks

Many of these workers were in blue-collar industrial jobs - the very jobs that disappeared over the next two decades as British industry shrank.

BBC: Analysis