fortunately; luckily

1. 幸虧他體質好，杰克才得以平安度過了最近這場大病。
   Thanks to his strong constitution, Jack was able to pull through his recent serious illness.
2. 幸虧我當時系上了安全帶。
   Thanks to I had tied then the safety belt.
3. 我以為他母親已去世，幸虧在我寄出吊唁信之前，我碰到了一個那天上午還在醫(yī)院里見過她母親的人，他使我避免了這場誤會。
   I thought his mother had died, but fortunately I met someone who'd actually seen her that morning in the hospital and he set me right before I sent off my letter of sympathy.
4. 我們需要說的只是幸虧我們沒有聽他的話。
   All we need say is that fortunately we did not listen to him.

虧的英語翻譯：