英语翻译certain rocks proceeded the earliest knowledge of electricity

英语翻译certain rocks proceeded the earliest knowledge of electricity 英语翻译pr ice 英语翻译用certain造句 英语翻译certain experiences 英语翻译如题：various projects during the course of considering whether to engage in这两段能告诉大致意思么？WHEREAS,B will be exposed to certain confidential and proprietary information from A for the supply of parts for various pr PR PR pr. 英语翻译As early as the latter part of 16th century ,experimenters were exploring static electricity.Discovery of the presence of magnetism in certain rocks proceeded the earliest knowledge of electricity．我用的手机是分批打的所以… certain certain certain 英语翻译重点：past a certain point 英语翻译a dedicated building on certain days. rocks my rocks是什么意思? It rocks rocks crumbl