horse of another (different) color; two different matters; two entirely different things
[two entirely different things;two different matters;horse of another
different
color] 指彼此无关的两种事物。也说“两码事”
指彼此无关的两种事物或两桩事情。如:善意的批评跟恶意的攻击完全是两回事。
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