by good fortune

例句：

1. 1.She was lucky enough to win the lottery.
   她很幸运赢得了彩票。
2. 2. He found himself in a fortunate situation.
   他发现自己处于一个幸运的情况中。
3. 3. I'm lucky to have such good friends around me.
   我很幸运能有这么多好朋友在身边。