您需要先根摩托罗拉德罗伊德您的手机如果你还没有这样做。

You need to first root your Motorola Droid phone if you haven't already done so.

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土壤中对植物有用的矿物质元素必须先溶解在土壤溶液中，然后才能被根吸收。

The mineral elements from the soil that are usable by the plant must be dissolved in the soil solution before they can be taken into the root.

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哪根蜡烛先掉下？哪根蜡烛最后掉下去？

Which candle falls first? Which candle falls last?

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