Grammar Note
作物质名词通常不可数；表示不同种类时可用复数 velvets。
天鹅绒；丝绒
velvets — plural of velvet
先理解核心含义，再看它在真实句子里的用法。
天鹅绒；丝绒
a closely woven fabric with a thick short pile on one side
The dress was made of soft red velvet, and it felt luxurious.
这件连衣裙是用柔软的红天鹅绒做的，摸起来很奢华。
紧密编织的织物(最初用丝绸,现也用棉或人造纤维),一面有浓密短绒。
A closely woven fabric (originally of silk, now also of cotton or man-made fibres) with a thick short pile on one side.
一种丝滑密实的绒面织物,背面平整
a silky densely piled fabric with a plain back
极细的毛皮,包括鹿角上的皮和毛。
Very fine fur, including the skin and fur on a deer's antlers.
She chose velvet for the curtains because it blocks out the light well.
她选天鹅绒做窗帘，因为它遮光效果好。
The cushion covers are velvet, so they need gentle cleaning.
这些靠垫套是天鹅绒的，所以需要轻柔清洗。
Choose the next layer that will help you use velvets with more confidence.
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
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Use velvets naturally, then get feedback on meaning, tone, grammar, and phrasing.
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作物质名词通常不可数；表示不同种类时可用复数 velvets。
Collins 词频等级为 2，建议结合例句记忆，而不是只背中文释义。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.