Wind velocity also increases with altitude and may cause serious stress fortrees, as is made evident by the deformed shapes at high altitudes.
风速也随着海拔高度的增加而增加,可能给树木带来严重的压力,这从高海拔地区的变形就可以看出来。
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This is particularly true fortrees in the middle and upper latitudes, which tend to attain greater heights on ridges, whereas in the tropics the trees reach their greater heights in the valleys.