1．observe vt.观察，观测；遵守、奉行(法律、习俗等)；庆祝(节日)

(1)(原句)Air­conditioned vehicles for observing animals.

供观察动物用的空调车。

(2)This law must be strictly observed.

这项法律必须严格遵守。

[归纳拓展]

(1)observe sb.do sth.看到某人做某事

observe sb.doing sth.看到某人正在做某事

observe that...看到，观察到......

(2)observation n．观察；观察力；观测

(3)observer n．观察者；评论者；遵守者 (3)His neighbor observed a stranger enter his house and take away some valuables.

他的邻居看见一个陌生人进入他家，拿走了许多贵重物品。

(4)He observed a stranger hanging around the store.

他看到一个陌生人在商店附近闲逛。

注意：observe为及物动词，其后可跟不带to的不定式的复合结构，但在被动结构中，不定式必须带to。

[即时跟踪]

(1)用所给动词的正确形式填空

①I observed him entering(enter) the bank with a gun.

②They did not observe her come(come) in and go upstairs.

③An airplane was observed to appear(appear) on the screen of radar.

(2)The man was observed open the window of the house.(单句改错)observed后加to

2．disadvantage n．不利，不利条件；缺点

(1)(原句)Disadvantages of US trip

(在)美国旅游的不利条件

[归纳拓展]