机能

with the aim of doing sth：有做某事地目的,为了做

without aim无目的地 | with the aim of doing sth有做某事地目的,为了做... | be aware of the potential causes of traffic accidents意识到交通事故的潜在原因

He has many acquaintances：(他交游甚广. )

1)I had some acquaintance with this subject. (对这一课题我... | 2)He has many acquaintances. (他交游甚广. ) | 3)It's necessary to acquaint Western readers with recent happenings in China.(向西方读者介绍...