1. 無(wú)足輕重的人 If you refer to someone as a nonentity, you mean that they are not special or important in any way.
e.g. Amidst the current bunch of nonentities, he is a towering figure... 在當前這幫無(wú)足輕重的人里面,他算是鶴立雞群。 e.g. She was written off then as a political nonentity. 她當時(shí)被認定是成不了氣候的政壇小人物。