preparatory

US /prɪˈper.ə.tɔːr.i/
UK /prɪˈper.ə.tɔːr.i/
1.

预备

serving as or carrying out preparation for a task or undertaking.

:
•
more preparatory work is needed
:
preliminaryinitialpriorintroductoryprefatoryopeningbasicelementaryfundamentalrudimentarypreparativeprecursory
:
preparatory school