no pcb libraries were found in this design file 添加PCB文件库时找不到是什么原因啊?

no pcb libraries were found in this design file 添加PCB文件库时找不到是什么原因啊? PCB99SE 中 “no schematic libraries were found in this design file 是 schematic 不是 pcb ...打酱油的 一边去 懂得来 O(∩_∩)O~ Are there any libraries near hereb.No,they aren't d.No,there aren't. protues7.5显示no libraries found!接着就加不了元器件,为什么? PCB PCB libraries是什么意思 Wer ist wer bist wer是什么? 什么是WER There are not libraries in our school.There is not library in our school.[Yes or No]There are not library in our school.There is not libraries in our school.同上. libraries单数是什么? libraries的单数是什么 libraries的原形 libraries什么意思 external-libraries是什么意思 lending libraries是什么意思