Steven killed the bird with his pocketknife.

史蒂文用隨身帶的小刀殺死了這只小鳥.

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I got a really good pocketknife for $ 10.

我花十美元買了一把非常好的折疊刀.

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Now, use your pocketknife to touch the mica and see what will happen.

現(xiàn)在你用小刀去觸及巖石中的云母,看看會(huì)產(chǎn)生什么現(xiàn)象.

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