反射弧的英文：
reflex arc
n. 反射，反映；回复；习惯性思维
adj. 反射的；反作用的
reflexive pronoun
ph.1. 【语】反身代词(如
It is used as a reflexive.
它被作为反身代词使用。
Myself is a reflexive pronoun.
Myself是反身代词。
Driving today demands lightning reflexes.
如今开车需要反应极其迅速。
Contemplation becomes reflexive, like breathing.
沉思也变得是反射性的，就像呼吸。
n. 弧（度）；弧形物；天穹；弧光
v. 形成拱状物；形成电弧；走弧线
piercing by electric arc
电弧穿孔
The beach swept around in an arc.
海滩呈弧形伸展开来。
The secant of the complement of a directed angle or arc.
余割有向角的余角或弧的余割
An electric arc is struck by contacting the electrodes.
接触电极便击出电弧。
A rainbow arced gracefully over the town.
彩虹在小城上空画出了一道优美的弧线。