单词：lignocellulosic anthracite
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298. The Steam Locomotive. 298．蒸汽机车 Steam was used to drive boats through the water. 人们用蒸汽在水上驱动船， Why should not steam be used to haul wagons over a railroad? 为什么不可以用蒸汽在路轨上拉动马车？ Th
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Giving the Seedligns a Hand A man of the state of Song was worried about his seedlingsgrowing too slowly He pulled up the seedlings one by one and went home exhausted．I am tired out today．I helped the seedlings to grow，he said to his family．H
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