Gazprom,Russia's gas export monopoly, also had signed a deal to sell China 70 billion cubic meters of natural gas a year.

VOA: standard.2009.10.13

A cubic kilometer of seawater, go into the ocean and imagine a box .

一千立方米的海水，想象一下一个体积为一千立方米的盒子。

麻省理工公开课 - 固态化学导论课程节选

A cubic kilometer of seawater, go into the ocean and imagine a box .

一千立方米的海水，想象一下一个体积为一千立方米的盒子。

麻省理工公开课 - 固态化学导论课程节选