A plural form of 'bus' — more than one bus.

A plural form of 'bus''bus'的複數形式 — more than one bus——不只一輛公車.

Here is the thing to understand: 'buses' and 'busses' are both correct English, but they are not equally common. 'Buses' with one s is the normal, standard spelling everywhere today, and it is what you should write.

Here is the thing to understand要弄懂的是: 'buses' and 'busses' are both correct English'buses'和'busses'都是正確的英文, but they are not equally common但兩者不是一樣常見. 'Buses' with one s'buses'（一個s） is the normal, standard spelling everywhere today是現在到處通用的標準拼法, and it is what you should write你應該這樣寫.

'Busses' is an older, less used spelling that you will still find in some American writing and in older books. If you write it, nobody will call it wrong, but it looks dated, and some readers will assume it is a typo.

'Busses'是比較舊、比較少人用的拼法 is an older, less used spelling that you will still find in some American writing and in older books在一些美式文章和舊書裡還看得到. If you write it如果你這樣寫, nobody will call it wrong不會有人說你錯, but it looks dated但看起來過時, and some readers will assume it is a typo有些讀者會以為你打錯字.

The reason English hesitates is that a one-syllable word ending in a single s usually doubles that s before an ending — gas→gasses (as a verb), quiz→quizzes — but 'bus' is a shortened word (from omnibus) and never fully settled into that rule.

The reason English hesitates英文會猶豫的原因 is that a one-syllable word ending in a single s usually doubles that s before an ending是因為單音節、字尾一個s的字，加字尾時通常會把s重複一次 — gas→gasses (as a verb), quiz→quizzes——像gas→gasses（當動詞用）、quiz→quizzes — but 'bus' is a shortened word (from omnibus)但'bus'是縮寫字（來自omnibus） and never fully settled into that rule所以一直沒有完全定下這個規則.

Note too that 'busses' is also the third-person form of the old verb 'buss' meaning 'to kiss': 'She busses him on the cheek.' That meaning is rare, so context makes it clear.

Note too要注意的是 that 'busses' is also the third-person form'busses'也是 of the old verb 'buss' meaning 'to kiss'舊動詞'buss'（意思是「親吻」）的第三人稱形式: 'She busses him on the cheek.''She busses him on the cheek.'（她親了他的臉頰） That meaning is rare這個意思很少見, so context makes it clear所以看上下文就分得出來.