15秒记一个单词「第223个」quartz

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  quartz /kwɔːts/ n. 石英

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  例句/词组:

  They have found some quartz in the cave.

  他们在洞里发现了石英。

  英语解释:

  a hard mineral, often in crystal form, that is used to make very accurate clocks and watches 石英

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