This room would look more cheerful for a spot of paint.
这个房间油漆一下就会显得更加悦目。
You're not your usual cheerful self today.
你今天不像往常那么快快乐乐的。
Why are you so bright and cheerful today?
你今天怎么这么高兴？
He felt homesick, but made a brave attempt to appear cheerful.
他很想家，但却竭力表现得很高兴。