drop-in
🇺🇸
/ˈdrɑːp ɪn/
🇬🇧
/ˈdrɒp ɪn/
adjective
R
A place or service you can use without making a special appointment.
I went to the library's drop-in session to use the computers.
我去圖書館的臨時會議使用電腦。
translation
即到即用