[经] average rate of return on investment
nián píng jūn tóu zī bào chóu lù: ㄋㄧㄢˊ ㄆㄧㄥˊ ㄐㄩㄣ ㄊㄡˊ ㄗ ㄅㄠˋ ㄔㄡˊ lu:4