[计] principle of software engineering
ruǎn jiàn gōng chéng jī běn yuán lǐ ㄖㄨㄢˇ ㄐㄧㄢˋ ㄍㄨㄥ ㄔㄥˊ ㄐㄧ ㄅㄣˇ ㄩㄢˊ ㄌㄧˇ