圆周

圆周是指圆或类似形状的周长。

圆周和数学上重要的数学常数π有关。若定义圆周为C，半径为r，直径为d，圆周长和直径的比值即为π：

{C}=\pi\cdot{d}=2\pi\cdot{r}.\!

π的数值是3.14159 26535 89793 ... （参照A000796）。

数学常数π常用在数学、工程学及科学中。

另一个和圆周有关的比例是圆周和半径的比值 $\tfrac{C}{r} = 2\pi$ ，虽然没有正式的名称，但也常用在弧度及物理常数等许多场合中。

单词	circumference
释义	circumference /səˈkʌmfərəns//sərˈkʌmfərəns/ 英汉-汉英词典 n. 周围;圆周形容词: circumferential 词组 \| 习惯用语 waist circumference 腰围 chest circumference 胸围 head circumference 头围 hip circumference 臀围英语例句库 The lake is twenty miles in circumference. 这湖周围二十哩。 The diameter and the circumference of a circle correlate. 圆的直径与圆周有相互关系。 It’s a mile round the circumference of the field. 运动场周长一英里。 Conclusions: Fluid displacement from the legs by LBPP increases neck circumference and Rph in healthy subjects. 下体正压引起的体液转移可增加健康受试者的颈周径和咽部阻力。 Objecties: To determine whether displacement of fluid from the lower body to the neck will increase both neck circumference and Rph in healthy subjects. 测定体液从下体转移到颈部是否增加健康受试者的颈周径和咽部阻力。 Definition : A strophoid of a circle with the pole O at the centre of the circle and the fixed point P on the circumference of the circle. 在圆上的环索线，以圆心为极点，圆周上的一点为固定点，所作出的图形！声明：以上例句、词性分类均由互联网资源自动生成，未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。原声例句 CNN 10 学生英语 2019年3月合集 It's also the ratio of a circle's circumference divided by its diameter. 它也是圆周长除以直径的比率。 6 Minute English 六分钟英语 Unlike an adventure round the circumference of the Earth. 不像沿着地球圆周进行的冒险。美食家基地 Round the circumference with the back of a knife. 用刀背绕圆周敲击。科学大揭秘 It's wider, or more technically, has a greater circumference at the Equator. 它更宽，或者更严格地说，在赤道有更大的周长。 PBS趣味科普 To them pi is the ratio of a circle's circumference to its diameter. 对他们来说，π 是圆的周长与直径之比。 Big Think超级思想录 Using this, he actually measured the circumference of the Earth, and he got it right 2,000 years ago. 利用这些，他准确地测量出地球的周长，并在2000年前就得到了正确的数据。科学60秒-科学美国人 2023年3月合集 In the simplest definition, pi is the ratio of a circle's circumference to its diameter. 在最简明的定义中，π是圆周长与其直径的比率。 Asap SCIENCE 精选 Circumference over diameter! 7,9 then 3,2,3. 周长看直径！7，9然后3，2，3。海底两万里（原版） It measured four to five miles in circumference. 它周围四海里至五海里长。 TED-Ed（视频版） That involves a constellation of symptoms, including high blood sugar, increased waist circumference, and high blood pressure. 代谢综合征有许多症状，包括高血糖，变大的腰围，和高血压。中文百科圆周圆周是指圆或类似形状的周长。圆周和数学上重要的数学常数π有关。若定义圆周为C，半径为r，直径为d，圆周长和直径的比值即为π： ${C}=\pi\cdot{d}=2\pi\cdot{r}.\!$ π的数值是3.14159 26535 89793 ... （参照A000796）。数学常数π常用在数学、工程学及科学中。另一个和圆周有关的比例是圆周和半径的比值 $\tfrac{C}{r} = 2\pi$ ，虽然没有正式的名称，但也常用在弧度及物理常数等许多场合中。英语百科 Circumference 圆周 The circumference (from Latin circumferentia, meaning "carrying around") of a closed curve or circular object is the linear distance around its edge. The circumference of a circle is of special importance in geometry and trigonometry. Informally "circumference" may also refer to the edge itself rather than to the length of the edge. Circumference is a special case of perimeter: the perimeter is the length around any closed figure, but conventionally "perimeter" is typically used in reference to a polygon while "circumference" typically refers to a continuously differentiable curve. 近义、反义、联想词近义词 n. size, boundary line, border, borderline, delimitation, mete, length 联想词 diameter直径;girth周围长度;waist腰，腰部;length长度，长;width宽度;radius半径，半径范围;thickness厚,粗;circle圆;height高度;curvature弯曲;waistline腰围;
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circumference /səˈkʌmfərəns//sərˈkʌmfərəns/

圆周

Circumference 圆周

近义词

联想词