[经] ratio of gross profit to net sales
máo lì duì xiāo shòu jìng é de bǐ lǜ ㄇㄠˊ ㄌㄧˋ ㄉㄨㄟˋ ㄒㄧㄠ ㄕㄡˋ ㄐㄧㄥˋ ㄜˊ ㄉㄜ˙ ㄅㄧˇ lv4