vi. 详述, 细说, 漫游

[ verb ]
add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing
<verb.communication> dilate elaborate enlarge expand exposit expound flesh out lucubrate
She elaborated on the main ideas in her dissertation

Expatiate \Ex*pa"ti*ate\, v. t.
To expand; to spread; to extend; to diffuse; to broaden.

Afford art an ample field in which to expatiate itself.
--Dryden.


Expatiate \Ex*pa"ti*ate\, v. i. [imp. & p. p. {Expatiated}; p.
pr. & vb. n. {Expariating}.] [L. expatiatus, exspatiatus, p.
p. of expatiari, exspatiari, to expatiate; ex out + spatiari
to walk about spread out, fr. spatium space. See {Space}.]
1. To range at large, or without restraint.

Bids his free soul expatiate in the skies. --Pope.

2. To enlarge in discourse or writing; to be copious in
argument or discussion; to descant.

He expatiated on the inconveniences of trade.
--Addison.