a. 有启发性的

[ adj ]
tending to increase knowledge or dissipate ignorance
<adj.all>
an enlightening glimpse of government in actionan illuminating lecture

Illuminate \Il*lu"mi*nate\, v. t. [imp. & p. p. {Illuminated};
p. pr. & vb. n. {Illuminating}.] [L. illuminatus, p. p. of
illuminare; pref. il- in + luminare to enlighten, fr. lumen
light. See {Luminous}, and cf. {Illume}, {Illumine},
{Enlimn}, {Limn}.]
1. To make light; to throw light on; to supply with light,
literally or figuratively; to brighten.

2. To light up; to decorate with artificial lights, as a
building or city, in token of rejoicing or respect.

3. To adorn, as a book or page with borders, initial letters,
or miniature pictures in colors and gold, as was done in
manuscripts of the Middle Ages.

4. To make plain or clear; to dispel the obscurity to by
knowledge or reason; to explain; to elucidate; as, to
illuminate a text, a problem, or a duty.


Illuminating \Il*lu"mi*na`ting\, a.
Giving or producing light; used for illumination.

{Illuminating gas}. See {Gas}, n., 2
(a) .