If you eavesdrop on someone, you listen secretly to what they are saying.
①The government illegally eavesdropped on his telephone conversations.
②The housemaid eavesdropped from behind the kitchen door.
Romain Gary的小说 Promise at Dawn 也出现了这个表达：
这里再补充一个同义短语表达：listen in （on） 窃听；偷听 【If you listen in to a private conversation, you secretly listen to it.】
He assigned federal agents to listen in on Martin Luther King's phone calls.
the dizzy heights（of something）
An important or successful position. This is often used to show that the position is not really very impressive.
①She dreamed of reaching the dizzy heights of stardom.
②I escalated to the dizzy heights of director's secretary.
Romain Gary的小说 Promise at dawn 也出现了这个表达：