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是否增加健康受试者的颈周径和力。

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！