当居民们于10月31号返回工作的时候，道路被封闭以及结冰，许多州通勤困难。

As residents headed back to work on October 31, closed or icy roads complicated commutes in multiple states.

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恶名远扬生物圈二号封闭生态系统项目就是未经充分准备仓促上马的前车之鉴。 1991年，首批八个人住进位于亚利桑那州图克森附近的生物圈二号。

The infamous Biosphere 2 closed-ecosystem project outside Tucson, Ariz., first inhabited by eight people in 1991, is the best example of an approach not to take.

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作为探索频道记录片《与狼生活》的明星，六年来，达奇尔夫妇和爱达荷州锯齿山脉的封闭野生动物栖息地中的一个狼群在一起。

Stars of the Discovery Channel documentary "Living with Wolves," the Dutchers spent six years with a Wolf pack in an enclosed wilderness habitat within Idaho's Sawtooth Mountains.

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