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本音を言う， 本音をいう， ほんねをいう
1. to speak one's mind, to be frank, to tell the truth
畅所欲言，直言不讳，实话实说
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@ 建前， 建て前， 立前， 立て前， たてまえ
1. face, official stance, public position or attitude (as opposed to private thoughts)
2. ceremony for the erection of the framework of a house
面貌、官方立场、公开立场或态度（相对于私人想法）；为人处世之道；房屋框架竖立仪式