"圆周"相关例句(82)
11.A circular arc of90=; one fourth of the circumference of a circle.
14.circumferential highways around cities.
16.The circumference of the earth is almost 25000 miles/The earth is almost 25000 miles in circumference.
17.An arc is a part of the circumference of a circle or other curved line.
18.As our circle of knowledge expands, so does the circumference of darkness surrounding it.


