adv. 幸亏=luckily=fortunately
不是字面意思上的gratefully
翻译：Thankfully, we found out the flaw and solved it immediately before launched the product.
参考翻译：Thankfully, we spotted a product defect in time and fixed it before the launch.
参考造句：Thankfully, everything went smoothly.
Once I was late for my flight. Thankfully, the flight got delayed, and I was able to board it eventually.
Thankfully, rubbish is one environmental issue where there is little need to worry about political incentives.
