Stand reasonably erect, your arms hanging naturally.
尽可能站直，双臂自然下垂。
《柯林斯英汉双解大词典》
Lisa was lolling in a chair with her arms hanging over the sides.
莉萨懒洋洋地靠在椅子上，两只胳膊垂在两边。
youdao
She was lolling in a chair, with her arms hanging over the sides.
她双臂垂在两旁，懒洋洋地躺在椅子上。
Their long, heavy arms, good for hanging from branches, act as pendulums to swing their weight forward as they uncoil from the crouch.
BBC: Gibbons' extraordinary jumps 'down to technique'
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