( + Supplementary content
The Chinese left parenthesis((全角括号) is used to introduce supplementary information, explanations, or examples within a sentence. It functions the same way as parentheses in English but uses the full-width character form standard in Chinese typesetting. It must always be paired with a closing).
这个词的意思是"快乐"(形容词)。
Zhège cí de yìsi shì "kuàilè" (xíngróngcí).
The meaning of this word is "happy" (adjective).
北京(中国的首都)有很多历史古迹。
Běijīng (Zhōngguó de shǒudū) yǒu hěn duō lìshǐ gǔjì.
Beijing (the capital of China) has many historical sites.
他的成绩很好(尤其是数学)。
Tā de chéngjì hěn hǎo (yóuqí shì shùxué).
His grades are very good (especially in math).