美国证交所天然气指数 Amex Natural Gas Index
作为所有天气系统中最强大的系统之一，飓风是由水蒸气凝结释放的热能所驱动的。
One of the most powerful of all weather systems, hurricanes are powered by the heat energy released by the condensation of water vapour.
相反，一个复杂的顶极群落，如温带森林，将承受天气和害虫所带来的大规模破坏。
In contrast, a complex climax community, such as a temperate forest, will tolerate considerable damage from weather to pests.
当你所居住的地球部分朝向太阳时，天气就会变热。
When the part of the earth where you live is towards the sun, you have hotter days.
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