主根垂直向下生长，以固定树身，并吸取深处的水分。
The taproot grows straight down to anchor the tree and reach for deep water.
在垂直于晶须生长方向上没有层错的存在。
There was no stacking fault in the direction perpendicular to the growth orientation.
在垂直于晶须生长方向上没有层错的存在。
There was no stacking fault in the direction perpendicular to the growth orientation.
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