How sad that all his hard work should come to nothing.
他的所有辛勤勞動竟全部付諸東流，太讓人傷心了。
The increase in crime is a sad reflection on our society today.
犯罪的'增加令人遺憾地反映了當(dāng)今社會不太好的一面。
It's a sad fact that many of those killed were children.
讓人難以接受的是遇難者中很多是孩子。