Minute fragments of shoot apices are proverbially difficult to culture.微小的茎尖切段通常是难以培养的.This concept has now been replaced, for stem apices, by the tunica - corpus theory.此观点目前已经被原套原体学说所取代....

apices的音标：apices的英式发音音标为：['epɪsi:z]apices的美式发音音标为：['epɪˌsɪz]...

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