merry as the day is long

例句：

1. 1. The children were merry as they played in the park.
   孩子们在公园里玩耍时非常高兴。
2. 2. Merry Christmas to you and your family!
   祝你和你的家人圣诞快乐！
3. 3. She was merry after her long journey home.
   她长途跋涉回家后很高兴。