Presource letter and Sourcing Recommendation form prepared for Pre-sourced Suppliers这句话怎么翻译啊,特别是Presource 和 pre-sourced

Presource letter and Sourcing Recommendation form prepared for Pre-sourced Suppliers这句话怎么翻译啊,特别是Presource 和 pre-sourced Say and write the letter. good-news letter and bad-news letter 两百字作文 The letter V is black and white? the National Institue of Arts and Letter letter letter 英语翻译Your password must contain at least one lowercase letter,one uppercase letter and one number. 英语句子 填介词 What letter is ___ Q and It's letter R. which letter is a drink and which letter is an animal There is( ) uletter and ( ) rletter in the word ruier 英语连词成句this black letter ,is ,and ,letter,that ,is,blue这些怎么连? this,black,letter,is,and,letter,that,is,blue（连词成句） What is the difference between a letter of credit and a letter of garantee? Why are the letter G and letter S in gloves close to each other? 脑筋急转弯：Why are the letter G and letter S in gloves close to each other? a bread and butter letter , a get-well letter 的中文翻译 It’s the letter sound and it’s an animal.This letter is______.