Definition: to not have any knowledge or experience of something Level: B2
很多人不熟悉这个系统。
A lot of people ___are ___unfamiliar ___with the system.
她不熟悉新规定。
She ___is ___unfamiliar ___with the new regulations.
许多游客不熟悉当地习俗。
Many tourists ___are ___unfamiliar ___with local customs.
