You use unluckily as a comment on something bad or unpleasant that happens to someone, in order to suggest sympathy for them or that it was not their fault.
例句
Unluckily for him, the fraud officers were watching this flight too...对他而言不幸的是，那些反诈骗官员也在密切注视着这个航班。Some people unluckily achieve suicide when they only meant to attempt it.一些人只是想尝试一下自杀，但却不幸真的身亡了。