1·The patients were observed over a period of several months.
这些病人被观察了数月之久。
—— 《牛津词典》
2·She observed the gentle movement of his chest as he breathed.
她观察着他呼吸时胸部的微微起伏。
—— 《牛津词典》
3·They had observed regularities in the behaviour of the animals.
他们曾观察过这些动物的习性。
—— 《牛津词典》
4·They covertly observed Lauren, who was sitting between Ned and Algie at a nearby table.
他们秘密地观察着邻近桌子上坐在内德和阿尔吉之间的罗伦。
—— 《柯林斯英汉双解大词典》
5·He observed it perfectly, and laughed in his heart.
他观察得很仔细,在心里笑了起来。