VERBS | ADVERB | PREPOSITIONVERBS➤be, prove缺乏;證明缺乏▸➤become變得不足ADVERB➤gravely, sadly, seriously, severely, woefully嚴重缺乏;非常缺乏;極為匱乏◇An educational system which fails to teach basic arithmetic is seriously deficient.一個不教基礎算術知識的教育體制是有嚴重缺陷的。➤slightly稍微不足➤intellectually, mentally智力缺陷;心智不健全PREPOSITION➤in缺乏⋯◇Their food is deficient in iron.他們的食物缺鐵。