circumferenceKK [ˌsɝˈkʌmfrəns] ｜ /ˌsɝˈkʌmfrəns/
GEPT 中高級
C1noun
the size of something as given by the distance around it
To determine the circumference of a circle, you can use the formula 2πr, where 'r' represents the radius of the circle.
周長；圓周
C1noun
the length of the closed curve of a circle
To find the circumference of a circle, multiply the diameter by pi.
（圓的）周長
C1noun
the boundary line encompassing an area or object
The jogger measured the circumference of the park using a measuring tape.
C2verb
to encircle or surround something
The soldiers formed a tight perimeter around the enemy camp, creating a circumference that prevented any escape.