学生用乐高制造机器人手臂

Student builds robotic arm out of Legos

听力扫障1.forearm n.前臂2.prosthetic adj.假体的3.currently adv.当前4.bioengineering n.生物工程5.version n.版本6.operational adj.操作的7.elbow n.肘部8.joint n.关节9.demonstrate v.展示扫码听测Ⅰ.