Clearly and obviously; in a clear and explicit manner.
清清楚楚，明确无误；正大光明。
明·施耐庵《水浒传》第45回账目已明明白白，并无分文来去。”
He explained the instructions so that everything was mingmingbaibai to everyone.
Learn the next connected idiom: 明明白白 (míng míng bái bái) → 白发苍苍 (bái fà cāng cāng)
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