be tangent to sth
几何语境中常用 be tangent to 表示“与……相切”。
The line is tangent to the curve at exactly one point.
这条直线与曲线恰好在一个点处相切。
离题的;不直接相关的;直的;笔直的;在一点与曲线相切但不交叉;与主要话题只有松散关系的话题;直的;不水平弯曲的
Touching a curve at only one point and not crossing it there.
在一点与曲线相切但不交叉
Touching a curve at a single point but not crossing it at that point.
与主要话题只有松散关系的话题
Of a topic, only loosely related to a main topic.
直的;不水平弯曲的
Straight; not horizontally curved.
The line is tangent to the circle at exactly one point, so it touches the curve only once.
这条直线与圆恰好相切于一点,因此它与曲线只接触一次。
用法提示:tangent 作形容词(表语),表示与曲线仅接触一点且不交叉。
To solve the problem, draw a tangent line to the parabola and mark where it touches.
要解决这个问题,画一条与抛物线相切的直线,并标出它与抛物线的接触点。
用法提示:tangent 作形容词修饰 line,表示与曲线相切的。
The two roads meet at a tangent point, touching but not crossing each other.
两条路在一个切点交汇,彼此相接但不交叉。
用法提示:tangent 作形容词作定语,修饰 point,表示切点。
几何语境中常用 be tangent to 表示“与……相切”。
The line is tangent to the curve at exactly one point.
这条直线与曲线恰好在一个点处相切。
作定语表示“离题的、与主题关系松散的”,常修饰 remark、comment 等词。
He made a tangent remark about the weather during the discussion.
讨论期间他说了一句关于天气的离题话。
grammar · medium
易错句子The line is tangent with the circle at point A.
正确表达The line is tangent to the circle at point A.
形容词 tangent 表示“相切的”时,后面固定接介词 to,不能按汉语“与……相切”的思路用 with。改成 tangent to 才符合英语的搭配规则。
grammar · medium
易错句子The line tangents the circle at point A.
正确表达The line is tangent to the circle at point A.
tangent 在英语里是形容词,不能像汉语“相切”那样当动词带宾语。表示“与……相切”要用 be tangent to 结构,让 tangent 作表语形容词。
数学上表示“与曲线相切”时用 tangent;表示“与主题关系不大”时,英语更常用形容词 tangential(如 a tangential remark),tangent 作形容词多见于数学语境;口语里说“跑题”常说 go off on a tangent,那里 tangent 是名词。
tangent 指与曲线只接触一点而不穿过,即相切;secant 指穿过曲线、与之相交于两点,即割。几何题里两者不能互换。
两者都带“接触”的意味,但 tangible 只表示“能摸到的、实在的”,不表示几何上的相切;谈数学相切或话题离题都不能用 tangible。
tangent + -ial (adj.)
tangential + -ly (adv.)
tangent + -cy (n.)
co- + tangent (n.)
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