B. During the heart stage leaves are initiated; and during the torpedo stage axis elongation occurs.

心阶段启动叶; 并在鱼雷阶段轴伸长率发生.

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D . During the heart stage axis elongation occurs; and during the torpedo stage leaves are initiated.

在心脏阶段轴期间伸长发生; 并且在鱼雷阶段期间叶子被创始.

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