A macaw screeched at him from its perch.是什么意思？

A macaw screeched at him from its perch.

一只金刚鹦鹉站在栖木上冲他尖叫。

macaw

n. 金刚鹦鹉，美国棕榈；

例句
A macaw screeched at him from its perch.
一只金刚鹦鹉站在栖木上冲他尖叫。

screeched

--

例句
A black Mercedes screeched to a halt beside the helicopter...
一辆黑色的梅赛德斯轿车在直升机旁嘎的一声刹住了。

at

prep. （表示位置）在，在（某时间或时刻），以，达， 向，朝；n. 阿特（老挝辅币单位，100 阿特 = 1 基普）；

例句
Prices start at £13.95 a metre for printed cotton...
印花棉布以每米13.95英镑的价格起售。

him

pron. (he的宾格)他；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。

from

prep. （表示时间）从…，（表示原因）因为，（表示来源）来自…，（表示分离）与…分离[隔开]；

例句
...an abortive attempt to prevent the current President from taking office.
企图阻止现任总统连任的失败尝试

its

pron. (it的所有格形式)它的，厥；

例句
The government is to accelerate its privatisation programme.
政府将加快其私有化计划的进程。

perch

n. 栖息处，栖枝，高处，鲈

例句
The perch is a freshwater fish.
鲈鱼是淡水鱼。