a. 表达得清楚的, 明白的, 明了的

[ adj ]
(of language) transparently clear; easily understandable
<adj.all>
writes in a limpid stylelucid directions
a luculent oration
pellucid prose
a crystal clear explanation
a perspicuous argument

Perspicuous \Per*spic"u*ous\, a. [L. perspicuus, from perspicere
to look through. See {Perspective}.]
1. Capable of being through; transparent; translucent; not
opaque. [Obs.] --Peacham.

2. Clear to the understanding; capable of being clearly
understood; clear in thought or in expression; not obscure
or ambiguous; as, a perspicuous writer; perspicuous
statements. ``The purpose is perspicuous.'' --Shak.
※ -- {Per*spic"u*ous*ly}, adv. --
{Per*spic"u*ous*ness}, n.