concavity

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英 { "us": "", "uk": "" }
数据源: ai_enrichment
concavity 指物体表面向内凹陷的形状或状态,常用于描述几何、物理或医学中的凹面结构。

用法要点

介词用法

concavity 常与介词 of 连用,表示某物的凹陷部分,如 the concavity of the lens(镜片的凹面)。也可用 in 表示在某个区域存在凹陷,如 a concavity in the surface(表面的一个凹坑)。

• the concavity of the bowl
• a concavity in the rock
• concavity of the earth's surface

语域说明

concavity 是正式或学术用语,多见于数学、物理、工程、医学等领域。日常口语中更常用简单词汇如 hollow 或 dent 来描述凹陷。

• concavity in geometry
• concavity of a function
• concavity in medical imaging

句型搭配

concavity 可作为主语或宾语,常见于描述性句子中,如 The concavity of the mirror affects light reflection(镜子的凹面影响光线反射)。也可用于被动结构,如 The concavity was measured precisely(凹度被精确测量)。

• The concavity is deep
• Measure the concavity
• Observe the concavity carefully

基础例句

The bowl has a slight concavity that holds soup well.

这个碗有一个轻微的凹陷,能很好地盛汤。

I noticed a concavity in the old wooden table.

我注意到旧木桌上有一个凹坑。

The mirror's concavity makes objects appear larger.

镜子的凹面使物体看起来更大。

There is a natural concavity in the rock where water collects.

岩石上有一个天然的凹陷,水会积聚在那里。

高级例句

In calculus, the concavity of a function indicates its curvature direction.

在微积分中,函数的凹性表示其曲率方向。

The engineer analyzed the concavity of the lens to optimize light focus.

工程师分析了镜片的凹面以优化光线聚焦。

Medical imaging revealed a concavity in the bone structure, suggesting a possible fracture.

医学影像显示骨骼结构中有凹陷,提示可能存在骨折。

The concavity of the earth's surface affects gravitational measurements in geophysics.

地球表面的凹陷影响地球物理学中的重力测量。

高频搭配

verb

measure concavityobserve concavitydescribe concavityanalyze concavitycreate concavity

adjective

deep concavityslight concavitynatural concavitypronounced concavityregular concavity

noun

surface concavitylens concavityconcavity mirrorconcavity depthconcavity shape

adverb

highly concavityslightly concavityclearly concavity

preposition

concavity ofconcavity inconcavity on

phrase

degree of concavitypoint of concavityarea of concavityform a concavity

常见错误

❌ 错误:The concavity is very big.
✓ 正确:The concavity is very deep or pronounced.

concavity 描述凹陷的程度或形状,通常用 deep(深)、slight(轻微)、pronounced(明显)等形容词修饰,避免用 big(大)这样笼统的词。

❌ 错误:I can see a concavity on the wall.
✓ 正确:I can see a concavity in the wall.

concavity 表示向内凹陷,通常用介词 in 表示在某个表面或物体内部存在凹陷,而不是 on(在表面上)。

近义词辨析

hollow

hollow 更通用,指中空或凹陷的空间,可以是名词或形容词,常用于日常描述;concavity 更专业,特指表面向内弯曲的几何形状,多用于学术语境。

The tree had a hollow inside (日常描述空间) vs. The lens has a precise concavity (专业描述形状)。

depression

depression 可指凹陷处,但更常表示情绪低落或经济萧条;concavity 更中性,专指物理或几何上的凹面,无情感或经济含义。

There was a depression in the ground after the rain (地面凹陷) vs. The concavity of the curve was calculated (曲线凹度计算)。