explanation
/ˌekspləˈneɪʃən/noun
1- a statement or account that makes something clear解释; 说明：
the birth rate is central to any explanation of population trends.
出生率是说明人口问题趋势的关键。
1.1
- a reason or justification given for an action or belief原因, 正当的理由; 解释：
Freud tried to make sex the explanation for everything
弗洛伊德试图用性来解释一切
mass noun my application was rejected without explanation.我的申请被无缘无故地拒绝了。
词源
late Middle English: from Latin explanatio（n-）, from the verb explanare （see EXPLAIN）.