The contraction calf muscle, urges the vein vasoconstriction, the acceleration vein blood backflow heart.

收缩小腿肌肉，促使静脉血管收缩，加速静脉血液回流心脏。

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The contraction calf muscle, urges the vein vasoconstriction, the acceleration vein blood backflow heart.

收缩小腿肌肉，促使静脉血管收缩，加速静脉血液回流心脏。

youdao