[经] ratio of selling and administrative expenses to net sales
tuī xiāo jí guǎn lǐ duì xiāo shòu jìng é de bǐ lǜ ㄊㄨㄟ ㄒㄧㄠ ㄐㄧˊ ㄍㄨㄢˇ ㄌㄧˇ ㄉㄨㄟˋ ㄒㄧㄠ ㄕㄡˋ ㄐㄧㄥˋ ㄜˊ ㄉㄜ˙ ㄅㄧˇ lv4