The priority is to ascertain which kurgans still have a layer of permafrost below them and might therefore be saved.
关键问题是弄清楚哪些库刚下面仍然有着一层冻土因此可以被保存下来。
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He hopes to find ways to keep temperatures down: possibilities include painting the kurgans white to reflect sunlight away, and installing underground "thermo-pumps" to stabilise the temperature.