happy as at high tide的用法和樣例：
例句
- I am happy to accept your invitation.
我很高興接受你的邀請。 - The children have a whale of a time at the funfair.
孩子們在遊樂場玩得很高興。 - The children are happy at the school, but they lack discipline.
孩子們在學校里很快活，但很散漫。 - She was happy apart from the fact that she could not return home.
除了不能回家之外，她很快活。
