Modern tennis rackets are now apparently 20 per cent lighter.现代的网球拍据说比以前的轻20%。He was put into prison because of rackets.他因敲诈被捕入狱.Tennis rackets and balls are provided.提供网球拍及网球。...
Last year the millionth truck rolled off the assembly line.去年，第100万台卡车驶下流水线。He is best remembered for the introduction of the moving assembly-line.他最为人铭记的创举是率先采用流水装配线。The assembly line of necessity kept moving.生产线势必保持运转下...