observed
v. 观察；遵守；注意到；庆祝（observe 的过去式与过去分词）
例句
Have you observed any changes lately?
最近你注意到什么变化没有？
《牛津词典》
The police observed a man enter the bank.
警察注意到一个男人走进了银行。
They had observed regularities in the behaviour of the animals.
他们曾观察过这些动物的习性。
