不幸的是 + Clause
不幸 (bùxìng) means "unfortunate" or "sadly" and can function as an adjective or adverb. It is often used at the beginning of a sentence in the pattern 不幸的是 (unfortunately) to introduce bad news or a regrettable outcome. It combines 不 (not) and 幸 (fortunate).
不幸的是,他没能赶上最后一班车。
Búxìng de shì, tā méi néng gǎnshàng zuìhòu yì bān chē.
Unfortunately, he didn't make it to the last bus.
那位登山者不幸在途中受了伤。
Nà wèi dēngshānzhě búxìng zài túzhōng shòu le shāng.
Unfortunately, the mountaineer was injured on the way.
不幸的是,这次实验又失败了。
Búxìng de shì, zhè cì shíyàn yòu shībài le.
Unfortunately, the experiment failed again.