represent意为表示,表达,代表,象征.指同类人或物中最典型的.可用于被动语态;stand for 意为代表,象征.指符号或标志的意义.不可用被动语态.如:

The statue represents farmers praying to God.那座雕像雕的是向上帝祈祷中的农民.

The country was represented at the conference by the Foreign Minister.代表那个国家出席会议的是外交部长.

CCTV stands for China Central Television Station.CCTV代表"中央电视台".