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北京怀柔深山里的喇嘛沟门满族乡素有北京“北极乡”之称。在那里的崇山峻岭之间,有的是无尽绵延的原始次生森林。在谷歌地球上用50米的比例尺查看,甚至似可听到风摆松涛,把高负氧离子含量的空气送往百
Beijing Huairou Mountain lamangmen door Manchuria known as Beijing “Arctic ” said. Between the mountains there, there are endless stretches of primitive secondary forests. In the Google Earth scale with 50 meters to view, or even seem to hear the loose pine, the high negative ion content of the air to hundreds of