[174-78] intelligible
adj.可理解的(apprehensible)[174-78] explicit
adj.明确的；清楚的(straightforward)[174-78] elusive
adj.难懂的(elusory,intangible)[174-78] mysterious
adj.神秘的；难以理解的(cryptic;undecipherable)[175-78] ignorant
adj.无知的，不了解的(unaware)[175-78] ignorance
n.无知[175-78] grasp
n./v.领会，(understanding，comprehension)[175-78] comprehend
vt.理解(understand)[175-78] comprehensive
adj.综合的；有理解力的