对粗鲁的陌生人回以极度礼貌,很刺激。
The work on IVF was driven by the desire to help infertile couples.
Stay focused and never lose sight of your goals.
胜绰不是不懂得这些道理,而是他把俸禄看得比义还重要。 
比喻贪心不足,终将自食恶果。