The International Air Transport Association, which represents 230 airlines around the world, predicts passenger demand will grow nearly 6 percent in 2010, while cargo demand is expected to see double digit growth.

VOA: standard.2010.03.30

It is a double column, You can see, it starts with hydrogen and goes to mercury in ascending order of atomic mass.

双纵栏，你们看到，从氢开始,然后到水银，按原子质量的升序排列。

麻省理工公开课 - 固态化学导论课程节选

And something that we'll see later on is that triple bonds, for example, are going to be stronger than a corresponding double bond or a corresponding single bond.

而我们以后还会看到三键，举例来说，应该更强，相较于相应的双键,或者相应的单键来说。

麻省理工公开课 - 化学原理课程节选

So it's very important to be keeping in mind that any time you see a double bond, you have a pi bond there, so you're not going to see any rotation around the bond axis.

所以你们要记住,任何时候你们看到一个双键，这里面有π键，你们不会看到关于键轴的任何转动。

麻省理工公开课 - 化学原理课程节选