... age specific survival rate 龄别存活率 age structure 龄级结构 age-grouping 按龄分群 ...
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... age class ==> 同龄级木,龄级 age class structure ==> 龄级结构 age coating ==> 老化变黑层 ...
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龄级结构
Age-class structure
以上为机器翻译结果，长、整句建议使用 人工翻译 。
根茎长度的年龄结构表现为1龄级与2龄级大体相同，3龄级陡度减少。
The age structure of rhizome length showed that the 1st and the 2nd age classes were equal on the whole, the 3rd age suddenly reduced.
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