Word · Frequency #6611
arc
弧；圆弧；曲线
a continuous part of a circle or other curve; any curved line
- 1.
That part of a circle which a heavenly body appears to pass through as it moves above and below the horizon.
天体视运动经过地平线上下时所对应的圆周弧段
- 2.
electrical conduction through a gas in an applied electric field
电场中气体的导电
- 3.
A continuous part of the circumference of a circle (circular arc) or of another curve.
圆周(圆弧)或其他曲线的连续一段
- 4.
a continuous portion of a circle
圆的一部分
- 5.
A curve, in general.
一般意义上的曲线
- 6.
something curved in shape
弧形物
- 7.
A band contained within parallel curves, or something of that shape.
夹在平行曲线之间的带状区域,或类似形状的东西
- 8.
A flow of current across an insulating medium; especially a hot, luminous discharge either between two electrodes or as lightning.
通过绝缘介质的电流流动；尤指电极间或闪电中的炽热发光放电
- 9.
A continuous mapping from a real interval (typically [0, 1]) into a space.
从实数区间(通常为[0,1])到空间的连续映射
- 10.
A directed edge.
有向边
- 11.
An arclight.
弧光灯
弧形物；拱形；电弧；弧光放电；弧光灯；有向边；弧；弧；连续映射
In use
The bridge formed a graceful arc over the river.
An electric arc was produced between the two electrodes.
The rainbow stretched in a colorful arc across the sky.
Connections
Collocations
- arc of a circle
- 圆弧
- Use a compass to draw the arc of a circle.用圆规画一段圆弧。
- electric arc
- 电弧
- The electric arc melted the metal instantly.电弧瞬间熔化了金属。
- arc lamp
- 弧光灯
- An arc lamp once illuminated the harbor.一盏弧光灯曾经照亮了港口。
- arc welding
- 电弧焊
- Arc welding requires a powerful electric current.电弧焊需要强大的电流。
Idioms & figurative uses
- the arc of history
- 历史的发展轨迹；历史之弧The arc of history is long, but it bends toward justice.历史的发展轨迹是漫长的，但它会趋向正义。
Learner notes
Memory Tip
arc 就像一张弓，字母 A 和 C 是弓的两端，中间 R 是弯曲的弓身，所以 arc 表示弧线。
Context & Register
语域：mixed 常见场景：几何/数学、天文学、电学/物理、日常弧形物体 arc 作名词时，语域会随使用领域变化：在几何、天文、电学等专业语境中，它多作为正式术语使用；在日常描述弧线或弧形物体时，语气则比较中性。由于缺少单一默认语域，这里标为 mixed。
Grammar Note
常用于 an arc of ... 结构
Pronunciation & Spelling
All of the above rhyme with arc /ɑrk/: the stressed vowel /ɑr/ and final /k/ match. Note that arc is spelled -rc while these end in -rk. Lookalikes that do NOT rhyme: arch /ɑrtʃ/, arctic /ˈɑrktɪk/, and arcade /ɑrˈkeɪd/.
Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
Learn the forms together
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.