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登山队员在冲顶之前要穿上特制的衣服。
Climbers should wear special clothes before they begin their journey to the mountain top.
youdao
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所产生的方波脉冲顶部平坦并且无内部结构。
The generated square pulses have flat top and no internal structure.
youdao
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所产生的方波脉冲顶部平坦并且无内部结构。
The generated square pulses have flat top and no internal structure.
youdao