周长: girth; circumference; perimeter 短语和例子周长约2英里的湖 a lake about two miles in circumference; 周长 6米的烟筒 a funnel six metres in girth; 圆的周长 the perimeter of a circle; 这棵树周长 6英尺。 the tree has a circ
砂轮周长: schleifscheibenumfangslnge peripheral length of grinding wheel
