单词	roller chain
释义	roller chain noun : a block chain in which hollow transverse blocks or cylinders turning on steel pins act as rollers to lessen friction Word History First Known Use 1841, in the meaning defined above
随便看	tea-things teaberries teaberry teaboard teaboards teabowl teabowls teaboxes teaboy teacakes teacarts teach teach (someone) a lesson teach a lesson teach a trick or two teach someone a lesson teach someone a trick or two teach-in teachabilities teachability teachable teachable moment teachableness teachablenesses teachabler

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