双语例句
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Dandruff is an oily substance and is usually grey or yellow.
头皮屑是一种油性物质,通常是灰色或黄色的.
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Any of various beetles that exude an oily substance from the leg joints that deters enemies.
当威吓敌方时会从腿的关节处渗出一种油状物质的各种甲虫。