[经] ratio of profit to net sales

lì rùn duì xiāo shòu jìng é de bǐ lǜ ㄌㄧˋ ㄖㄨㄣˋ ㄉㄨㄟˋ ㄒㄧㄠ ㄕㄡˋ ㄐㄧㄥˋ ㄜˊ ㄉㄜ˙ ㄅㄧˇ lv4