a perfect circle

英汉例句

Is the circle a perfect circle?
请问，这个圆圈是完美无缺的圈吗？
Really? There is definitely a connection. It's very strange because we're so different, but we create a perfect circle together.
真的吗？这里肯定有一个联系。这非常的奇妙，因为我们非常不一样，但我们在一起的时候创建了一个完美的环。
blog.sina.com.cn
Where a perfect circle has an eccentricity value of zero, roughly half of exoplanets seen thus far have an eccentricity of 0.25 or greater.
一般一个完美圆周的偏心值为0，而约有一半的系外行星的偏心值在0.25或者更高。

Here's the explanation: If the Earth made a perfect circle round the sun, the seasons would be almost exactly equal.
NPR: Not All Seasons Are Created Equal
So, I think, there's going to be - sort of actually appreciating almost a perfect circle of that kind of achievement.
NPR: Really Important Football Game Coming
The software is intuitive, so the robot can describe a perfect circle, say, if the operator shows it just a few points.
ECONOMIST: Robots: Nothing to lose but their chains