circumference

名词

1. 1

   圆周长、周长

   To find the circumference of a circle, multiply the diameter by pi.

   要求圆的周长，把直径乘以圆周率即可。

2. 2

   周围、外围

   A narrow path runs around the circumference of the lake.

   湖的周围有一条狭窄的小径。

3. 3

   围长、粗细

   The old tree measures nearly six meters in circumference.

   这棵老树的树围将近六公尺。