微不足道: negligible, insignificant...
主导: leading, dominant, prevailing, to lead, to direct, to dominate...
自行车: bicycle, bike...
心病: anxiety, sore point, secret worry, mental disorder, heart disease (medicine)...
秒: second (unit of time), arc second (angular measurement unit), (coll.) instantly...
啦啦队: cheerleading squad...
主人公: hero (of a novel or film), main protagonist...
董事: board member...
周旋: to mix with others, to socialize, to deal with, to contend...
沉淀: to settle, to precipitate (solid sediment out of a solution)...
