翻译和例句:
in Norway, Italy and Austria, some people performed somersaults (翻筋斗) on skis. Later, freestyle skiing... of the 20th century in Norway, Italy and Austria, some people performed somersaults (翻筋斗) on skis. Later ……
performed somersaults (翻筋斗) on skis. Later, freestyle skiing began to take off in the US during...;.At the beginning of the 20th century in Norway, Italy and Austria, some people performed somersaults (翻筋斗 ……
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