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This is a energy comparison method using balance bridge.
这是一种利用平衡电桥和能量比较的方法。
youdao
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He lost his balance when crossing the bridge and fell into the river.
过桥的时候因失去了平衡而掉进了河里。
youdao
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He lost his balance when crossing the bridge and fell into the river.
过桥的时候因失去了平衡而掉进了河里。
youdao