deep-going but easy to-understand; explain the profound in simple terms;go deep into the subject yet put it in simple words;penetrating yet easy to comprehend; treat a difficult matter in a simple and explicit way ❍ 一次在一个中学开群众大会，周恩来同志用～的道理，宣传我们党的主张。(《敬爱的周总理我们永远怀念您》 Ⅱ—42) On one occasion he called a mass meeting in the yard of a middle school and explained the Party’s principles there in a simple and explicit way.
深入浅出
explaining profound theories in simple language
深入浅出
explain profound (or complex) ideas in plain terms;express the profound in plain language
深入浅出shēn rù qiǎn chū
用浅显通俗的语言把深刻的道理表达出来。explain the profound in simple terms, profound but easily understood, be simple but profound