directrix

美 [d?'rektr?ks] 　英 [d?'rektr?ks]

• n.【數(shù)】準線；〈古〉同“directress”
• 網(wǎng)絡(luò)拋物線的準線；導(dǎo)面

詞形變化

復(fù)數(shù)：directrixes  復(fù)數(shù)：directrices  

英漢解釋

n.	1. 【數(shù)】準線 2. 〈古〉同“directress”

英英解釋

n.	1. <archaic>Same as directress

例句

A fixed point whose relationship with a directrix determines a conic section.

焦點一個與準線的關(guān)系決定圓錐形狀的定點

The directrix line of a conic.

二次曲線的準線。

Select the directrix of the new conic. . .

選擇新二次曲線的準線…

New Latin parametrum [a line through the focus and parallel to the directrix of a conic]

現(xiàn)代拉丁語parametrum[通過焦點并與圓錐曲線的準軸線平行的直線]

Developable Surfaces Generated by a Directrix

導(dǎo)線生成的可展曲面

Constructing Directrix for Conic Curve

圓錐曲線準線的幾何作圖