The photograph is unfortunately not good enough to use.不巧的是, 那张照片不够清楚, 无法使用。

Unfortunately, my time is limited.遗憾的是, 我时间有限。

Unfortunately, I arrived late.不幸的是我迟到了。

Unfortunately for him, he panicked.很不幸的是, 他当时惊慌失措了。

Unfortunately for the Prince, his title brought obligations as well as privileges.令王子遗憾的是, 他的身份不仅给了他特权, 也给他带来了责任。