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1·In light of the special highland climate conditions of Qingzang Railway, the vacuum dejectas collecting system suitable for highland passenger cars is selected.

根据青藏铁路特殊的高原气候条件，选择了适合高原客车使用的真空集便系统。

2·Yes, climate on this highland always changes unpredictably.

是的，高原地区的气侯就是这么变化多端。