He knows that from A to Z

He knows that from A to Z
He knows that from A to Z

He knows that from A to Z
形容他对某方面知识非常的了解,擅长.：）

他精通那个。
from A to Z 【词典解释】：1. 从头至尾;完全地; 【例句】：1. Mr. Smith knows the subject from A to Z. 史密斯先生精通此学科。