Auxins influence the growth of stems toward light (phototropism) and against the force of gravity (geotropism).
它可影响茎的向
性和背地性生长。
Auxins influence the growth of stems toward light (phototropism) and against the force of gravity (geotropism).
它可影响茎的向性和背地性生长。
The microorgan-isms employed include mainly chemical conversion bacteria,phototropic bacteria and alga.
所利用的生物体主要包
：
转细菌、向性细菌和藻
。
：以上例句、词性分
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