| 单词 | grey substance |
| 例句 | DEFINITIVE EXAMPLES 权威例句Over the years, the pipes in our house have slowly furred (up) (=a hard grey substance has formed in them).经过几年之后,我们房子里的水管慢慢地结起了水垢。剑桥国际 |
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下次你路过 ,人间已无我。-「欢呼哈雷」
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