11×2 =1﹣ 12 ,
12×3 = 12 ﹣ 13 ,
13×4 = 13 ﹣ 14 ,
14×5 = 14 ﹣ 15 ,
…
1n×(n+1) = 1n ﹣ 1n+1
请完成下面的问题:
— Ang Lee, a Chinese director, won the Best Director again in his last year.
— How great he was! It was his time to win an Oscar.