The lake is twenty miles in circumference.

这湖围二十哩。

The diameter and the circumference of a circle correlate.

圆直径与圆有相互关系。

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

运动场英里。

Conclusions: Fluid displacement from the legs by LBPP increases neck circumference and Rph in healthy subjects.

下正压引起液转移可增加健康受颈径和咽部阻力。

Objecties: To determine whether displacement of fluid from the lower body to the neck will increase both neck circumference and Rph in healthy subjects.

测定液从下转移到颈部是否增加健康受颈径和咽部阻力。

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.

在圆上环索线，以圆心为极点，圆上点为固定点，所作出图形！