邪恶: sinister, vicious, wicked, evil...
不在乎: not to care...
频繁: frequently, often...
公民: citizen...
谜底: answer to a riddle...
学: to learn, to study, to imitate, science, -ology...
畅谈: to talk freely, to discuss without inhibition...
预见: to foresee, to predict, to forecast, to envision, foresight, intuition, vision...
过时: old-fashioned, out of date, to be later than the time stipulated or agreed upon...
限: to limit, to restrict, (bound form) limit, bound...