vt.

1. 看到，注意到[+（that）][+wh-][O3][O4]
   He observed a stranger hanging around the store.

   他看到一个陌生人在商店附近闲逛。

   I observed him stop at the gate.

   我看到他在门口停下来。

   He pretended not to observe our entry.

   他装作没有看见我们进来。

2. 观察，观测；监视
   They carefully observed the behavior of deer.

   他们仔细观察了鹿的生活习性。

3. 遵守，奉行
   This law must be strictly observed.

   这项法律必须严格遵守。

4. 说；评述，评论
   He observed that it was a lovely day.

   他说天气真好。

5. 庆祝（节日等）
   Some people observe Christmas here.

   在这儿有些人过圣诞节。

vi.

1. 注意；观察
2. 说；评述，评论[（+on/upon）]
   He observed on modern art.

   他谈了对现代艺术的看法。

v.

1. notice; perceive.
   ▸watch attentively.
   ▸detect in the course of a scientific study.
2. say; remark:
   ‘It's chilly,’ she observed.
3. fulfil or comply with (an obligation).