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2、
The two-part rubber tree ( Hevea brasiliensis ) is a superior clone grafted on a seedling family.
在橡胶树优良有性系实生苗上嫁接优良无性系,即形成两合树.
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3、
If they could be turned into usable crops , they could outstrip even Hevea.
蒲公英被视为杂草, 是因为它们生命力强,生长迅速.
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4、
Six methods for testing the v iability of Hevea seeds were compared.
采用比较研究法,比较了6种方法测定橡胶树种子活力的准确度.
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