1
an opaque
An opaque is any material that does not allow light to pass through.
不透明物是指任何不允许光线通过的材料。
不透明物；不透明体
先理解核心含义，再看它在真实句子里的用法。
不透明物；不透明体
Something that is opaque, rather than translucent.
An opaque is any material that does not allow light to pass through.
不透明物是指任何不允许光线通过的材料。
不透明而非半透明的东西。
Something which is opaque rather than translucent.
The sculptor added an opaque to the installation to cast a deep shadow.
雕塑家给装置添加了一块不透明物，以投下深影。
The lab technician placed an opaque over the sample to protect it from light.
实验室技术人员在样品上放了一个不透明物，以防光线损害。
The building's windows were fitted with opaques to reduce heat gain.
大楼的窗户安装了不透明材料以减少热量吸收。
An opaque is any material that does not allow light to pass through.
不透明物是指任何不允许光线通过的材料。
使用定冠词特指某个已知的不透明物。
The opaque in the laboratory is a dark, heavy object.
实验室里的不透明物是一个黑色重物。
Not this
This material is an opaque.
Use this
This material is opaque.
这里混淆了名词和形容词用法。'opaque' 作形容词表示'不透明的'，直接用在系动词后作表语；而 'an opaque' 是名词短语，表示'一个不透明物'，不符合本句描述性质的语义。
Not this
The experiment uses several opaque of different colors.
Use this
The experiment uses several opaques of different colors.
这里遗漏了名词复数形式。'opaque' 作为可数名词，其复数形式是 'opaques'，在表示多个不透明物时需要加-s。
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Includes Synonyms & Antonyms
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记住：Opaque 不透明，字母 O 像眼睛，Q 像一片大叶子挡在眼前，光透不过。
语域：neutral 常见场景：书面描述、技术说明 作名词时多用于书面或技术性描述，指不透明的东西；日常更常用形容词 opaque 加名词的结构。
作为名词，指不透明物，有复数形式，常与不定冠词或定冠词连用。
Dictionary facts from AI_FALLBACK, ECDICT, OCTANOVE, WIKTIONARY, WORDNET.