英汉词典

1. （尤指为了解而）观察，观测
    If you observe a person or thing, you watch them carefully, especially in order to learn something about them.

    e.g. Stern also studies and observes the behaviour of babies...
           斯特恩还研究观察婴儿的行为。
    e.g. Are there any classes I could observe?...
           有我可以观摩的课吗？

2. 看到；注意到
    If you observe someone or something, you see or notice them.

    e.g. In 1664 Hooke observed a reddish spot on the surface of the planet.
           1664年，胡克注意到这颗行星表面有一块微红的斑点。

3. （尤指就注意到或深思熟虑之事）说，评论，评述
    If you observe that something is the case, you make a remark or comment about it, especially when it is something you have noticed and thought about a lot.

    e.g. We observe that the first calls for radical transformation did not begin until the period of the industrial revolution...
           我们认为直到工业革命时期才出现了要求彻底变革的第一波呐喊。
    e.g. 'He is a fine young man,' observed Stephen.
           “他是个很不错的小伙子，”斯蒂芬评论道。

4. 遵守，奉行（法律、习俗等）
    If you observe something such as a law or custom, you obey it or follow it.

observe的解释

    e.g. Imposing speed restrictions is easy, but forcing motorists to observe them is trickier...
           限制车速容易，但强制司机遵守这些限速规定就难办多了。
    e.g. The army was observing a ceasefire...
           军队正遵守停火协议。