【解答】很高兴在这里给你解答问题.
1、Qomolangma is higher than any other mountain in the world.=
意思：珠穆朗玛峰比其它任何一个山峰都高.
=Qomolangma is the highest mountain in the world.
意思：珠穆朗玛峰是世界最高的山峰.
2、The Sahara is the largest desert in the world.=
意思：撒哈拉沙漠是世界上最大的沙漠.
=The Sahara is larger than any other desert in the world.
意思：撒哈拉沙漠比世界上其它任何一个沙漠都大.
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希望我给你的回答,