名词
中文翻译：灰色锡
同义词：
['grey tin', 'gray metal']
例句：
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1. The old house was painteda bright yellow, but the gray tinroof remained unchanged.
那所老房子被刷成了明亮的黄色，但灰色的锡屋顶却始终未变。
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2. The greytin cans were stacked neatlyon the shelf.
那些灰色锡罐整齐地堆放在架子上。
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3. Thegrey tin roof had beentarnished by years ofexposure to the elements.
经过多年暴露于各种元素下，灰色锡屋顶已经变得斑驳不堪。