To be utterly fair and impartial in one's judgments or dealings, like a perfectly balanced scale.
在处理这件事情时，他表示自己一定会我心如秤，绝不偏袒任何一方。
When handling this matter, he stated that he would be utterly impartial, never favoring any side.
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To be utterly fair and impartial in one's judgments or dealings, like a perfectly balanced scale.