名词

1. 观察者；观测者；目击者
You can refer to someone who sees or notices something as an observer .

2. 观察家;评论员
An observer is someone who studies current events and situations, especially in order to comment on them and predict what will happen next.

3. （监督重大事件或局势的）观察员
An observer is a person who is sent to observe an important event or situation, especially in order to make sure it happens as it should, or so that they can tell other people about it.

1. a person who becomes aware (of things or events) through the senses

Synonym: perceiverpercipientbeholder

2. an expert who observes and comments on something

Synonym: commentator