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。

　　It was sad to see them go.

　　看著他們離去，真讓人難過。

　　You'd have to be sad to wear a shirt like that.

　　你穿著那樣的襯衣顯得老氣。

　　I was very sad indeed to hear of your father's death.

　　聽到令尊大人去世，我感到非常難過。