"But by distributing the presentation of a difficult point over several classes, everything becomes a difficult point." Bi says that now their approach is to offer a simple explanation and to review as they reach related points.
「但難點分散就變成處處是難點，」她說，後來他們修正為先簡單說明，以後遇到相關概念，再進行循環鞏固複習。