Word · Frequency #15114
circumference
周长；圆周
the distance around the outside of a circle or round object
- 1.
The line that bounds a circle or other two-dimensional figure.
圆周。
- 2.
the size of something as given by the distance around it
物体周围的距离所表示的大小
- 3.
The length of such a line.
周长。
- 4.
the boundary line encompassing an area or object
包围区域或物体的边界线
- 5.
The length of the longest cycle of a graph.
图中最长环的长度。
- 6.
the length of the closed curve of a circle
圆的周长
圆周。；物体周围的距离所表示的大小；周长。；包围区域或物体的边界线；图中最长环的长度。
In use
To find the circumference of a circle, multiply the diameter by pi.
The runner measured the circumference of the lake before planning her route.
Please measure the circumference of the tree trunk to see how much it has grown.
he had walked the full circumference of his land
a danger to all races over the whole circumference of the globe
the circumference of [noun]
用于描述圆形物体的周长。
The circumference of the Earth is about 40,000 kilometers.
地球的周长大约是4万公里。
have a circumference of [number] [unit]
强调数值测量。
Connections
Collocations
- the circumference of a circle
- 圆的周长
- The circumference of the circle is about 94 centimeters.这个圆的周长大约为94厘米。
- measure the circumference
- 测量周长
- You need a tape measure to measure the circumference of the tree trunk.你需要一把卷尺来测量树干的周长。
- waist circumference
- 腰围
- Waist circumference is an important indicator of health.腰围是健康的重要指标。
- head circumference
- 头围
- The doctor measured the baby's head circumference.医生测量了婴儿的头围。
- around the circumference
- 沿着圆周
- Dots were placed evenly around the circumference of the wheel.小点均匀地分布在轮子的圆周上。
Learner notes
Memory Tip
circum（环绕）+ ference（携带）→ 想象绕圆走一圈量出的长度，即圆的周长。
Context & Register
语域：formal 常见场景：mathematics、geometry textbooks、scientific measurement circumference 是较正式的几何/科技术语，多用于数学、科学或测量场合；日常口语中更常说 distance around 或 perimeter。
Pronunciation & Spelling
前四个词都以 -ference 结尾，拼写相近，并且结尾都读作弱读的 /fɚəns/（也可较快读成 /frəns/），但它们与 circumference /sɝˈkʌmfrəns/ 并不同韵，因为 circumference 的重音在第二个音节 /kʌm/，而这些词的重音都在第一个音节。其中 reference /ˈrɛfɚəns/ 和 preference /ˈprɛfɚəns/ 重读元音都是 /ɛ/，所以彼此押韵；conference /ˈkɑːnfɚəns/ 和 difference /ˈdɪfɚəns/ 的重读元音不同，不押韵。circumstance /ˈsɝkəmstæns/ 和 circus /ˈsɝkəs/ 是拼写上的形近词：它们分别共享 circum- 和 circ-，但发音与 circumference 差异很大，不能按拼写类推。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.