... 下层社会 lower classes; 下层树冠高 lower crown height; 下层树林 undergrove; ...
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lower cloud point crown height 下层树冠高
The results showed that with pear genus dwarf stocks, the most combinations' trunk diameter is thinner, tree height is lower, growth shoots length is shorter, but crown diameter is bigger.
结果表明，梨属矮化砧木做中间砧，多数组合表现出树体干径细，高度低，发育枝短，但冠径较大。
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