第四，应在冬季到来之前，用一些措施，以防止冻伤。
Fourth, before the winter comes, using some measures to prevent frostbite.
与在珠峰上要防止冻伤不同，月球上的挑战将是在长达两星期的“月球天”的太阳直射下保持身体的清凉。
Rather than getting frostbite on Everest, the challenge would be staying cool under the glaring sun of the two-week long "day" on the moon.
防止嘴巴冻伤的最好办法，凡士林还可以抹在鼻子和面部。
You can also use the Vaseline on your nose and cheeks (or anywhere else on your face) to prevent windburn and chapping.
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