Flower bud differentiation, the basis of bolting, is the initial symbol that cabbage transform from nutritional growth phase to reproductive growth.
花芽分化是甘蓝从营养生长向生殖生长转变的最初标志，是抽苔的基础。
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Research and practice on the application of experimental psychology to the travel maps symbol design-a case study of the confusing differentiation experiment;