例如，生长素刺激细胞延伸的速度，促使芽和根生长，而抑制侧枝的生长。
Auxin, for instance, stimulates the rate of cell elongation, causes shoots to grow up and roots to grow down, and inhibits the growth of lateral shoots.
相反，两个细胞结合，将他们的DNA合并成一个新的单细胞体继续生长—触角可以延伸几码远。
Instead, two cells merge, combining their DNA into a new single-celled organism that just keeps growing - extending tentacles that can extend as far as several yards.
神经再生包括轴突的发芽、生长和延伸与靶细胞重建突触联系，依此来实现神经再支配功能的恢复。
Nerve regeneration involves axonal sprouting, growthing and extension, as well as reconstructing synaptic relate with target cell, which can be depended to realize the nerves re dominated function.
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