大大小小案子办了不少
“and handled many cases, big and small,”
THE DIALOGUE REEL
我们在这这么多年
“We've been here for years”
大大小小 案子 办了 不少
“and handled many cases, big and small,”
就没有一次
“but never once”
“We are seasoned veterans who know what we're doing, so don't doubt our competence.”
In Chinese law enforcement and bureaucratic culture, proving one's veteran status (资历) through case volume is a key way to establish indisputable professional authority.
LEARNING CHUNKS & PARTICLES
big and small; of all sizes; various kinds of
An AABB reduplicated adjective used before plural nouns to emphasize comprehensive variety and scale.
to handle a case; to investigate cases
Standard spoken collocation referring to police or judicial casework.
have handled quite a few / plenty
Uses litotes ('not a few') to pragmatically indicate a very large number.