1、形容词：fortunate ，意为“侥幸的，幸运的；带来幸运的，吉利的” ；

It is fortunate that the tanker did not leak.

庆幸的是，油罐车没有发生泄漏。

2、副词：fortunately ，意为“幸运地”。

Fortunately, the weather that winter was reasonably mild.

幸好那个冬天还算暖和。