A belfry is the high part of a building, often a church, where bells hang — a bell tower, or the room in the tower that holds the bells. People also use it a little loosely for the whole tower.

A belfry鐘樓 is the high part of a building, often a church是建築物（通常是教堂）較高的部分，where bells hang掛鐘的地方——a bell tower, or the room in the tower that holds the bells也就是鐘塔，或塔裡放鐘的那個房間。People also use it a little loosely for the whole tower人們也會比較鬆散地用它來指整座塔。

Though actually the word did not start as “bell” plus something. It came from an old Germanic word for a defensive tower, and English later reshaped the front to look like bell because bells lived there. So the spelling is a folk story that stuck.

Though actually不過事實上，the word did not start as "bell" plus something這個字一開始並不是「bell」加上別的東西組成的。It came from an old Germanic word for a defensive tower它源自一個古日耳曼語裡指「防禦塔」的字，and English later reshaped the front to look like bell後來英語把字的前半改得看起來像bell，because bells lived there因為鐘就住在那裡。So the spelling is a folk story that stuck所以這個拼法其實是一個流傳下來的民間誤會。

You meet belfry in older writing, church descriptions, and the set phrase “bats in the belfry”, meaning someone is a bit mad — as if bats were flying in the bell tower of their head.

You meet belfry in older writing, church descriptions你會在比較老派的文章、教堂介紹裡遇到belfry，and the set phrase "bats in the belfry"還有固定用語「bats in the belfry」，meaning someone is a bit mad意思是某人有點瘋瘋癲癲——as if bats were flying in the bell tower of their head好像蝙蝠在他們腦袋裡的鐘樓裡飛來飛去。

That phrase is informal and a little old-fashioned, and it is not a kind thing to say about a person in front of them.

That phrase is informal and a little old-fashioned這句話很口語，也有點老派，and it is not a kind thing to say about a person in front of them而且當著人家的面這樣說並不厚道。