who

• 疑问代词或关系代词，用于指人或人们。注：在现代英语中，who 并不被归类为限定词，而是作主语或宾语的人称代词。

Primarily an interrogative and relative pronoun used to refer to a person or people. Note: 'Who' is not standardly classified as a determiner in modern English grammar (unlike 'whose' or 'which'). It functions as a subject or object pronoun. This entry includes its primary pronominal meanings for completeness, as it does not function as a determiner modifying a noun directly in contemporary usage.

1. Interrogative pronoun (identity)A1formal

   Used to ask for information about the identity of a specific person or people. It functions as the subject or object of the verb.

   疑问代词（身份）

   • Who is calling?
   • Who did you meet?
   • Who are they?

2. Relative pronoun (defining)A2formal

   Used to introduce a relative clause that provides essential information about a person mentioned previously. It functions as the subject or object within the clause.

   关系代词（限定性）

   • The woman who lives next door is a doctor.
   • He is the one who helped me.
   • People who live in glass houses shouldn't throw stones.

3. Relative pronoun (non-defining)B1formal

   Used to introduce a relative clause that adds extra, non-essential information about a person. It is usually separated by commas.

   关系代词（非限制性）

   • My brother, who lives in London, is visiting us.
   • Ms. Jones, who taught me math, retired last year.
   • The CEO, who was appointed recently, announced changes.

• 世界卫生组织的简称，是联合国下属的专门机构，负责协调国际公共卫生事务，并帮助各国政府改善医疗卫生服务。

An abbreviation for a United Nations agency that coordinates international health activities and assists governments in improving health services.

不可数 · 专有名词

1. World Health OrganizationB2formal

   A specialized agency of the United Nations responsible for international public health, coordinating global health initiatives and assisting governments in improving health services.

   世界卫生组织

   • The WHO declared the outbreak a global health emergency.
   • WHO guidelines recommend regular hand washing to prevent infection.
   • The organization works closely with WHO to distribute vaccines.