英语语法分析

Lillehammer's opening ceremonies featured a giant Olympic Torch burning biogas produced by rotting vegetation.

利勒哈默尔的开幕式上有一个巨大的奥运火炬，它是由腐烂植物产生的沼气燃烧着的。

"A tank is enough to get you around the region for the day, but you have to plan ahead," Martin Risberg, a county engineer, said as he filled a biogas Volvo.

“一个油箱就足够让你在这一地区转上一天，但你必须提前计划。”该县工程师马丁·里斯伯格一边给一辆沼气沃尔沃加满油，一边说。

In the United States, biogas systems are rare.

在美国，沼气系统非常少见。