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。

It’s a mile round the circumference of the field.

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！