名词
中文翻译：领口延长
同义词：
['collar widening', 'collar expansion']
例句：
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1.The new shirt has a collar extension that makes it more comfortable to wear.
这件新衬衫有一个领口扩展，穿着更舒适。
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2.The tailor made the collar extension to fit his tall frame perfectly.
裁缝做了领口扩展，完美地适合他的高身材。
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3.The dog's collar extension was so big that it covered most of his neck.
狗的领口扩展很大，几乎覆盖了他的脖子。