名词
中文翻译：手臂
同义词：
['fingered', 'hand', 'limb', 'appendage']
例句：
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1.She reached out to touch the wall with her arm.
她伸出手臂去触摸墙壁。
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2.The arm of a chair is often longer than its backrest.
椅子的扶手通常比背靠部分要长。
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3. The arm of the tree reaches down to the ground.
这棵树的树枝垂到地面。