[计] low-level I/O standard package
dī jí shū rù shū chū biāo zhǔn chéng xù bāo ㄉㄧ ㄐㄧˊ ㄕㄨ ㄖㄨˋ ㄕㄨ ㄔㄨ ㄅㄧㄠ ㄓㄨㄣˇ ㄔㄥˊ ㄒㄩˋ ㄅㄠ