bàochóu dìjiǎn dìnglǜ

== Mandarin == === Romanization === bàochóu dìjiǎn dìnglǜ (Zhuyin ㄅㄠˋ ㄔㄡˊ ㄉㄧˋ ㄐㄧㄢˇ ㄉㄧㄥˋ ㄌㄩˋ) Hanyu Pinyin reading of 報酬遞減定律 / 报酬递减定律