sufficiency

1. N-UNCOUNT Sufficiencyof something is enough of that thing to achieve a purpose or to fulfil a need. 充裕[正式] [also 'a' N, oft N 'of' n] →see also self-sufficiency

There's a sufficiency of drama in these lives to sustain your interest. 这些人的生活充满戏剧性，使人不断产生兴趣。