这名男子可能还杀过别的人，只可惜我们没有确凿的证据。
This man may have killed others but unfortunately we have no firm evidence.
如果因为宣传不够而没有人出席，那就太可惜了。
It would be a shame if no one shows up because there isn't enough publicity.
可惜，这意味着对于一次性的噪音没有什么办法，比如有人尝试学习吹小号产生的噪音。
This unfortunately means that there is not much that can be done about one-off noise, like someone trying to learn to play a trumpet.
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