r. by good fortune
adv. 幸运地, 幸亏
1. Fortunately, I found my keys before I left the house.
幸运的是，我在离开家之前找到了我的钥匙。
2. Fortunately, the weather was perfect for our picnic.
幸运的是，天气非常适合我们的野餐。
3. Fortunately, she passed the exam after studying hard.
幸运的是，她经过努力学习后通过了考试。