夜以继日: night and day (idiom); continuous strenuous effort...
题: topic, problem for discussion, exam question, subject, to inscribe, to mention...
波涛: great waves, billows...
推断: to infer, to deduce, to predict, to extrapolate...
博客: blog (loanword), weblog, blogger...
时: o'clock, time, when, hour, season, period...
农历: the traditional Chinese calendar, the lunar calendar...
主题: theme, subject...
介绍: to introduce (sb to sb), to give a presentation, to present (sb for a job etc),...
去年: last year...