question mark

A punctuation mark (?) used at the end of a sentence to indicate a direct question, or figuratively to refer to something uncertain or unknown.

• 🇨🇳表示疑问的标点符号（?），用在句子末尾表示直接提问；也引申指不确定或未知的事物。

1. Punctuation mark A1 formal

   A punctuation symbol (?) placed at the end of a sentence to indicate a direct question.

   • Always put a question mark at the end of a question.
   • He forgot to add a question mark to his sentence.
   • The teacher corrected the missing question mark in the essay.

   🇨🇳问号

2. Uncertainty or doubt B2 informal

   A situation or issue that is uncertain or unknown.

   • The future of the project is still a question mark.
   • His health remains a big question mark after the accident.
   • There is a question mark over the company's financial stability.

   🇨🇳不确定或怀疑