他示范如何修补车胎刺孔.He demonstrated how to mend a puncture.设计了一种金属孔板波纹填料用刺孔机,包括上、下辊轮, 刺辊, 槽辊, 减速系统.It includes the up and down rolling wheel , thorny roller, groovy roller, reducing gears....
After a three-weekend courtship, Pamela accepted Randolph's proposal of marriage.经过3个周末的追求之后,帕梅拉接受了伦道夫的求婚。Randolph's work was exclusively concerned with the effects of pollution on health.伦道夫的著作专门论述污染对健康的影响。She...