expedition

n. /ˌekspəˈdɪʃn/ B2

远征；探险队；考察

An organized journey with a particular scientific or exploring purpose.

仙境例句

The Mock Turtle once led an expedition to the deepest part of the sea to find his old school.

假海龟曾经带领一支探险队，到大海最深处去寻找他的老学校。