to waste time creating something that already exists
浪费时间创造已经存在的东西 (làngfèi shíjiān chuàngzào yǐjīng cúnzài de dōngxī)
"Don’t reinvent the wheel; use the existing design."
"不要重新发明轮子; 使用现有设计。" (Bùyào **zhòngxīn fāmíng lúnzi**; shǐyòng xiàn yǒu shèjì.)
to become very angry or emotional suddenly
behind the surface; the underlying mechanism or system
to complete a formal education program
to understand or gain control of something
to take advantage of the present moment
to improvise or decide as you go rather than following a fix...
