lead roll meaning in Chinese

导纸辊
铅辊

Cisco systems has played a leading roll in the development of the internet since its inception through advanced technology and product development
自从诞生以来，思科系统公司通过自身先进的技术和产品开发在推动互联网的过程中发挥了领导作用。
Last part of the paper , it presents a outlook of system development and prospect . the teaching mode of dual - initiative , which can brings teachers into leading roll and embodies students in cognition role , more fits teaching development ; historical inheritance model of student can provides system an accurate assessment for student and implements optimal teaching effect
华东师范大学计算机系硕士学位论文一个双主型的计算机基础智能教学系统的设计与实现本文提出的双主型教学模型，既能发挥教师的主导作用又能充分体现学生认知主体作用，更符合我国目前的教学发展情况;有学习历史继承的学生模型，使系统对学生的评估比较准确，实现了最优的教学效果。