擒纵轮不断地被擒纵叉阻止和释放，与钟摆的周期相一致地运转。

The escapement wheel is blocked in turns by each pallet-stone and freed at each oscillation of the regulator through the fork and balance. Concurrently the pallets keep the oscillator running.

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结论：A型肉毒素通过抑制三叉神经血管系统中降钙素基因相关肽释放和无菌性炎症反应而减轻偏头痛症状。

CONCLUSION: BTX-A can relieve migraine symptoms by inhibiting CGRP releasing from trigeminovascular system and preventing meningeal sterile inflammatory response.

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