推土机推起一堆堆泥土。
确保你在下卧的时候吸气,在推起的时候吐气。
Ensure you breathe in on the way down, and breathe out as you push up.
屈臂慢慢降低你的上身直到大臂水平然后推起。
Proceed to lower yourself slowly by bending your elbows until your upper arms are parallel to the bench and push up.
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