1 [U] the act of watching sb/sth carefully, especially to learn sth 观察（尤指为了了解某事）: My research involves the observation of animals in their natural surroundings. 我的研究包括观察动物在自然环境下如何生活。The patient is being kept under observation. 病人目前正接受观察。

2 [U] the ability to notice things 观察力: Scientists need good powers of observation. 科学家要有良好的观察力。

3 [C] an observation (about/on sth) something that you say or write about sth 言论；评论: He began by making a few general observations about the sales figures. 他在讲话的开头部份对销售额发表了几句笼统的评论。 ☞Look at remark and comment. These words are more common. 参看remark及comment。这两个词较常用。