多年冻土人为上限 artificial permafrost table
吃得苦中苦方为人上人 If you wish to be the best man, you must be prepared to suffer the bitterest of the bitter
形态学上人为改变 morphologic artifact
选择朋友以有仁义道德之人为上，他们会带给你意想不到的欢喜。
Choose a friend to have on the morality of human, they will bring you unexpected joy.
我们本着“以人为上，以诚为本”的服务宗旨，竭力为您提供满意的服务，随时欢迎您的光临！
We are guided by "people on the honesty-oriented" principle of service, strive to provide you with satisfactory service, always welcome you!
比如在火星上，为了在长期任务中对抗这些影响，宇航员肯定需要人为制造重力。
To counter these effects on a long-duration mission, say, Mars, astronauts will certainly need to create their own artificial gravity.
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