1
this/that/the + conic + be + noun phrase
conic 是 conic section 的简称，作可数名词时单数前需加限定词。
This conic is a parabola.
这条圆锥曲线是抛物线。
圆锥曲线
conics — plural of conic
先理解核心含义，再看它在真实句子里的用法。
圆锥曲线
A conic section; a curve formed by the intersection of a plane with a circular cone.
This conic is a parabola.
这条圆锥曲线是抛物线。
圆锥曲线。
A conic section.
(几何)平面与圆锥相交产生的曲线
(geometry) a curve generated by the intersection of a plane and a circular cone
In geometry class, the teacher drew a conic on the board and asked us to identify it.
几何课上，老师在黑板上画了一条圆锥曲线，让我们辨认它。
The orbit of a planet is a conic, but it is usually close to a circle.
行星的轨道是圆锥曲线，但通常接近圆形。
We studied several conics, including the ellipse and the hyperbola.
我们研究了包括椭圆和双曲线在内的几种圆锥曲线。
conic 是 conic section 的简称，作可数名词时单数前需加限定词。
This conic is a parabola.
这条圆锥曲线是抛物线。
用 a 表示泛指；表示多个时用复数形式 conics。
A conic can be an ellipse or a hyperbola.
圆锥曲线可以是椭圆或双曲线。
可用 that 引导定语从句对 conic 进行限定。
The conic that we plotted yesterday is a hyperbola.
我们昨天绘制的那条圆锥曲线是双曲线。
Not this
I drew conic in math class.
Use this
I drew a conic in math class.
conic 在此是单数可数名词，前面需要冠词 a；汉语没有冠词，容易漏掉。
Not this
We studied three conic in class.
Use this
We studied three conics in class.
conic 是可数名词，复数要在词尾加 -s；汉语名词没有复数变化，容易漏掉。
Not this
A parabola is a cone.
Use this
A parabola is a conic.
cone 指圆锥体，conic 指圆锥曲线；parabola 属于 conic，不是 cone。
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几何学中，conic 是 conic section 的简称。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.