① observe vt .& vi. 观察，注意到；遵守(法律、习俗等)；
庆祝(节日等)；评论，评述
(回归课本P33)Qi Baishi observed the world of nature very carefully，and his paintings are special because of this.
齐白石对自然界观察得很仔细，他的画因此而别具特色。
【归纳总结】
①He observed that the key was missing the moment he got home.
他一到家就发现钥匙不见了。
