formal <正式>
- (of an area of study) serving as a preliminary instruction or as an introduction to further study（研究领域）预备的; 初步的; 基本的。
- an introduction to a subject or area of study入门。
派生词
propaedeutical
adjective词源
late 18th cent.: from PRO-2 'before'+Greek paideutikos 'of or for teaching'，suggested by Greek propaideuein 'teach beforehand'.