circumference

1. N-UNCOUNT The circumference of a circle, place, or round object is the distance around its edge. 周长

...a scientist calculating the Earth's circumference. …一位正在计算地球周长的科学家。

2. N-UNCOUNT The circumference of a circle, place, or round object is its edge. 周边

Cut the salmon into long strips and wrap it round the circumference of the bread. 把鲑鱼切成长条，然后把它裹在面包的四周。