周长

周长 [zhōu cháng]

1. ■ girth; circumference; perimeter:

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 circumference of 6 feet.