英语语法分析

And what was the point of a quartic steering wheel?

而且四次式的方向盘又是怎么一回事啊？

A complete quartic polynomial consists of 15 terms.

一个完整四次的多项式由15项组成。

Bicircular quartic is a very important classics of higher plane curves.

重虚圆点四次曲线是很重要的一类高次平面曲线。