1
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。
周长；圆周
先理解核心含义，再看它在真实句子里的用法。
周长；圆周
the distance around the outside of a circle or round object
The circumference of the Earth is about 40,000 kilometers.
地球的周长大约是4万公里。
圆周。
The line that bounds a circle or other two-dimensional figure.
物体周围的距离所表示的大小
the size of something as given by the distance around it
周长。
The length of such a line.
包围区域或物体的边界线
the boundary line encompassing an area or object
To find the circumference of a circle, multiply the diameter by pi.
要计算圆的周长，用直径乘以圆周率。
AI contextual example
The runner measured the circumference of the lake before planning her route.
那位跑步者在规划路线之前测量了湖的周长。
AI contextual example
Please measure the circumference of the tree trunk to see how much it has grown.
请测量树干一周的长度，看看它长了多少。
AI contextual example
he had walked the full circumference of his land
他沿着自己的土地走了一整圈
WordNet
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。
强调数值测量。
The tree trunk has a circumference of 3 meters.
树干周长为3米。
We need to measure the circumference of the circle accurately.
我们需要精确测量这个圆的周长。
表示沿着圆周分布。
There are several small holes drilled around the circumference of the pipe.
沿着管子的周缘钻了几个小孔。
Not this
The circle circumferences 10 centimeters.
Use this
The circumference of the circle is 10 centimeters.
错误地将“circumference”当作动词使用，但它是名词。应使用“the circumference of”或“in circumference”来表达周长测量。
Not this
The tree measures 2 meters around the circumference.
Use this
The tree measures 2 meters in circumference.
表达周长测量时应用“in circumference”而非“around the circumference”，后者语义重复且不自然。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
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。
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。
腰围
Waist circumference is an important indicator of health.
腰围是健康的重要指标。
头围
The doctor measured the baby's head circumference.
医生测量了婴儿的头围。
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。
生命的周长不是由我们呼吸的次数来衡量的，而是由那些让我们屏息的瞬间来衡量的。
This inspirational saying is widely shared on posters and social media and is often attributed to writer Hilary Cooper. It uses the word "circumference" figuratively to describe the full measure of a person's life.
这句励志名言广泛出现在海报和社交媒体上，常被归于作家希拉里·库珀。它用“circumference”一词比喻人生的全部限度或范围。
Use circumference naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
circum（环绕）+ ference（携带）→ 想象绕圆走一圈量出的长度，即圆的周长。
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。
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。
Dictionary facts from ECDICT, WIKTIONARY.