名词
中文翻译：臂部延伸
同义词：
['extension', 'arm span例句：1. The scientist extended his arm to show the model how to operate the machine.（科学家伸出手臂向模型展示如何操作机器。）']
例句：
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1. The scientist extended his arm to show the model how to operate the machine.
科学家伸出手臂向模型展示如何操作机器。
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2.The dancer's arm extension was impressive, as she executed a complex routine with ease.
舞者的手臂伸展令人印象深刻，她轻松地完成了一个复杂的动作串。
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3. The marathon runner stretched his arm extension to prepare for the next sprint.
马拉松跑者伸展手臂以准备下一个短跑。