For convenience, the principal components with most messages are used in making an upper standheight table of the manchurian walnut site types which will be applied to the forest production.
为使用方便起见，以信息量最多的第一主分量，编制核桃楸立地类型上层林分高表，应用于林业生产实际。
2
At the height of 8,000 meters, there is only 30% O? 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。
3
Between keeping your laptop cool and setting it at the right height for work, this folding stand that I found is perfect and I never go out without it.