有人说，在这种氧气稀薄的高处，施行救援太危险。
Some say that at such oxygen-deprived altitudes , rescues are too perilous .
一个处理方法是将它们在没有氧气或者氧气稀薄的情况下烘干。
One way of dealing with them is to dry them and then heat them with little or no oxygen present.
登山队员用一根棍子将火焰移取到火炬上。中国专家两年前就开始研究火炬设计图，为了使火炬能在氧气稀薄的地方燃烧。
China's experts began to study the design of the torch two years ago in order to keep the flame alight in the oxygen-thin air.
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