n.观察者，观察员，观察家，观测者，目击者，旁听者，评论员

原形：observer复数：observers

Eric is an acute observer of the social scene.
埃里克是个敏锐的社会现状观察者。
Tom is a good observer.
汤姆擅长观察。
The observer watched the experiment with keen interest.
观察者饶有兴趣地观看了实验。
In astronomy, an observer on Earth can only see one side of the moon.
在天文学中，地球上的观察者只能看到月球的一面。
The UN has sent an observer team to monitor the ceasefire.
联合国已派出一个观察员小组监督停火协议。
As a political observer, she often predicts election outcomes accurately.
作为一名政治观察家，她经常准确预测选举结果。
The sports commentator is actually an experienced observer of the game.
体育评论员实际上是一位经验丰富的比赛观察者。
The psychologist acted as an objective observer during the group discussion.
心理学家在小组讨论中扮演了客观观察者的角色。
The observer noted every detail of the crime scene for the police report.
观察者为警方报告记录了犯罪现场的每一个细节。
From his vantage point, the observer could see the entire city.
从他的有利位置，观察者可以看到整个城市。
The environmental activist was an avid observer of the impact of climate change.
这位环保活动家密切关注着气候变化的影响。
In a double-blind study, neither the participants nor the observer knows who's receiving the placebo.
在双盲研究中，参与者和观察者都不知道谁接受的是安慰剂。