fountainhead and river source—motive force; source ? 生活是文藝創(chuàng)作的～。Life is the source of literary and artistic creation. ? 問(wèn)渠那得清如何？為有～來(lái)。(朱熹《觀書(shū)有感》) If you ask why the canal is so clear?|Because the flowing water has come from the waterhead.