"Don't even think about it babe," Sledge said. "It's almost twenty feet down amongst protruding rocks with minimum ski-able width. I've been down this run once before and looked at it and decided no way. As they say, very off-piste."
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"No, that was certainly his sledge," said Gerda; "for when he went away he took his sledge with him."
“不，那一定是他的雪橇！”格尔达说；“因为当他离开的时候带着他的雪橇。”
What Galileo had said was no actually the sledge keep going because the natural motion of things is to keep going in the same direction they are going at the same speed unless acted upon by a force.
伽利略说其实雪橇并没有继续前进，物质的自然力以相同速度，朝着相同方向运行，除非受到了某个力的影响。
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