Thus a car requires five wheels including the spare.
比如一辆车包括备的在内一共需要5个轮胎。
Writing a five-paragraph theme is like riding a bicycle with training wheels; it's a device that helps you learn.
五段论犹如在小孩子在学习骑脚踏车的时候,使用辅助轮,它是帮助人们学习的工具。
The main characteristics of abrasive wheels include five factors, namely abrasive material, grain size, hardness, structure and bond type.
砂轮的主要特征包括磨料、粒度、硬度、组织个结合剂五个因素。
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