不同的机械加工方式，只要认真操作，均可获得相同的加工精度。
错误
暂无解析
早一天解决环境问题意味着早一点回复生态平衡。
Welookforwardtofurtherextensionsofpleasantbusinessrelations.
Mobilephonesandtheinternetplayanimportantpartinthewaywhichpeoplerelatetooneanothersocially.Doyouthinktheadvantagesoutweighthedisadvantages?
Student or work?
TheBrainandtheComputer