My head circumference is very big, so the hat doesn't fit me.

我的头围非常大，所以这个帽子不适合我。

The circumference of this circle is hard to measure.

这个圆的周长很难测量。

We need to connect this point with the point on the circumference first.

我们需要先把这个点与圆周线上的点连接起来。

The island is 3.5 km in circumference.

这个岛周长3.5千米

The earth is almost 25 000 miles in circumference.

地球的周长大约为25 000英里。

Now all the mass is at the circumference, and now it takes more time.

现在所有的质量都在圆周上，现在它会花更多的时间。

I have to have a whole number of wavelengths to get around the circumference.

我必须有很多波长才能绕这个圆周。

CARDIA study scientists weighed and measured the waist circumference and BMI of study participants.

从事 CARDIA 研究的科学家们，对研究参与者进行称重和腰围与身体质量指数（BMI）的测量。

CARDIA study scientists weighed and measured the waist circumference and BMI of study participants.

从事 CARDIA 研究的科学家们，对研究参与者进行称重和腰围与身体质量指数（BMI）的测量。