脚印: footprint...
阶层: hierarchy, stratum, social class...
算盘: abacus, plan, scheme...
需求: requirement, to require, (economics) demand...
尽管: despite, although, even though, in spite of, unhesitatingly, do not hesitate (to ask, complain etc), (go ahead and do it) without hesitating...
开明: enlightened, open-minded, enlightenment...
单打: singles (in sports)...
灾: disaster; calamity; adversity; personal misfortune...
别致: novel; unique; unconventional...
骗子: swindler, a cheat...