At the height of 8,000 meters, there is only 30% O₂ and the human body can only stand this height for a few days, so it is dangerous for humans to climb higher.
在8000米的高度,只有30%的氧气,人体只能处于这个高度仅几天,所以人类再往上爬是危险的。
Stand on a higher ground without others feeling the difference in height, and it will win the discerning eye of others.
站在一定的高度而从不让别人感觉你的高度,更能赢得别人的刮目相看。
By using observation data over 50 years, the paper systematically analyzed the relations of different stand density with diameter, height, crown of trees and so on.
利用近50年的系统定位观测资料,分析红松果材兼用林不同林分密度与直径、树高、冠幅等主要测树因子的关系。
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