direct connection短语¹⁵³⁵⁰ 基本例句 直接联结 Is there a direct connection between tooth loss and smoking? 吸烟与牙齿缺失有联系吗？ blog.sina.com.cn The principal processes and physical metallurgy of direct connection of continuous casting-hot rolling technology is reviewed. 阐述了连铸连轧的基本方式及其金属学特点。 cnki