a. 不知疲倦的, 有耐性的, 不屈不挠的

[ adj ]
showing sustained enthusiastic action with unflagging vitality
<adj.all>
an indefatigable advocate of equal rightsa tireless worker
unflagging pursuit of excellence

Indefatigable \In`de*fat"i*ga*ble\
([i^]n`d[-e]*f[a^]t"[i^]*g[.a]*b'l), a. [L. indefatigabilis:
cf. OF. indefatigable. See {In-} not, and {Defatigable}, and
cf. {Infatigable}.]
Incapable of being fatigued; not readily exhausted;
unremitting in labor or effort; untiring; unwearying; not
yielding to fatigue; as, indefatigable exertions,
perseverance, application. ``A constant, indefatigable
attendance.'' --South.

Upborne with indefatigable wings. --Milton.

Syn: Unwearied; untiring; persevering; persistent.