来看一个例句:Since the day a good friend of mine died of lung cancer, I decided to go cold turkey and never light up another cigarette. It was tough, but it was the smartest thing I ever did in my life.(自从我一个要好朋友因为肺癌去世的那天起,我就下定决心彻底戒烟,从此以后我再也没有抽过一支烟。那是很不容易的,可那是我一生中我做的最明智的一件事。)