名词
中文翻译：杰克绳
同义词：
['jacket cord', 'jackline cord']
例句：
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1.The jack cord was used to secure the luggage.
杰克线被用来固定行李。
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2.He tied a jack cord around his neck for safety.
他为了安全把一条杰克线系在脖子上。
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3. The jack cord was a useful tool for hanging clothes on the line.
杰克线是挂衣服在绳子上的一个有用的工具。