[经] profit ratio of average paid-in capital

píng jūn jiǎo rù zī běn de lì rùn lǜ ㄆㄧㄥˊ ㄐㄩㄣ ㄐㄧㄠˇ ㄖㄨˋ ㄗ ㄅㄣˇ ㄉㄜ˙ ㄌㄧˋ ㄖㄨㄣˋ lv4