This room would look more cheerful for a spot of paint.
這個房間油漆一下就會顯得更加悅目。
You're not your usual cheerful self today.
你今天不像往常那么快快樂樂的。
Why are you so bright and cheerful today?
你今天怎么這么高興？
He felt homesick, but made a brave attempt to appear cheerful.
他很想家，但卻竭力表現得很高興。