谙熟

ān shú dì lǐ xué

谙熟地理学

knowledgeable about geography

ān shú yīng yǔ

谙熟英语

be well versed in the English

ān shú míng yán

谙熟名言

an expert on aphorisms

ān shú shì jiè lì shǐ

谙熟世界历史

be conversant with world history

ān shú háng yè mén lù de tuī xiāo yuán

谙熟行业门路的推销员

a salesman who knew all the tricks of the trade