生长素- - -最被大众所熟知的植物激素之一，是一种相当重要，且具有相当广谱的调控活性范围的植物生长调节激素。
Auxins, one of the best-known plant growth factors, have an extremely wide spectrum of activity, and are particularly important.
生长素是最重要的植物激素之一，参与了植物生长发育的各个方面。
Auxin is one of the most important plant hormones in that it regulates almost all aspects of plant growth and development.
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