He lit a cigarette and perched on the corner of the desk. [VERB prep./adv.]

他点了一根烟，坐在桌角上。

He perched himself on the side of the bed. [VERB pronoun-reflexive prep./adv.]

他坐在床沿上。

...the vast slums that perch precariously on top of the hills around which the city was built. [VERB prep./adv.]

坐落在城市周围的山峰上、摇摇欲坠的贫民窟

The builders have perched a light concrete dome on eight slender columns. [VERB noun + on]

建筑工人在8根细柱上架起轻巧的混凝土穹顶。

A blackbird flew down and perched on the parapet outside his window. [VERB prep.]

一只乌鸫飞下来，停在他窗外的矮墙上。

There is a trend for knocking public-school headmasters and headmistresses off their perches.

现在有一种推翻公立学校校长权威性的趋势。