a. 完美的, 无缺点的

[化] 无故障的

[ adj ]
without fault or error
<adj.all>
faultless logicspeaks impeccable French
timing and technique were immaculate
an immaculate record

Faultless \Fault"less\, a.
Without fault; not defective or imperfect; free from blemish;
free from incorrectness, vice, or offense; perfect; as, a
faultless poem.

Whoever thinks a faultless piece to see,
Thinks what ne'er was, nor is, nor e'er shall be.
--Pope.

Syn: Blameless; spotless; perfect. See {Blameless}. --
{Fault"less*ly}, adv.-{Fault"less*ness}, n.