Buy a large candle, and use a mechanical pencil with no lead in it to engrave a message.
买一支大蜡烛，然后用一支没有装铅芯的自动铅笔在上面雕刻一些特别的标语。
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His classmates began to write, but the lead inside child's mechanical pencil kept broken.
同学开始写了，大家都一直在写，可是小孩的自动铅笔芯不停断掉。
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