于是yúshì〈连词conj.〉表示后一事紧接着前一事,后一事往往是由前一事引起的{[indicating that the latter immediately follows the former, and that the latter is oft. led to by the former] so; then; thereupon; hence}: 大家一鼓励,我～恢复了信心。{With your encouragement, I've regained my confidence.}也说also于是乎{yúshìhū}。