重点讲解：
1. as a result of 结果；
There was no positive evidence that any birth defects had arisen as a result of Vitamin A intake.
没有确凿证据证明，摄取维生素A会导致出生缺陷!rgp+lN.N=Wt1。
2. set out to do sth. 开始；着手；
We set out to find the truth behind the mystery.
我们开始着手揭开谜团背后的真相%-4[~8U7,TSlCR%。
3. be attributable to 可归因于…的，可归结于…的；
10,000 deaths a year from chronic lung disease are attributable to smoking.
吸烟导致每年有1万人死于慢性肺病;Mre]lAFk4A;xABhvE9c。
4. after all 毕竟；终究；
I thought you might know somebody. After all, you're the man with connections.
我以为你可能认识某个重要人物@iLC[&=IR=GjmUbH。毕竟你交游甚广Q!e7YMHg%_V。