Nos. is a written short form of “numbers”, used when you mean more than one number. You put it before the figures, the way you put No. before a single one: “rooms nos. 12–14” means “room numbers 12 to 14”.

Nos. Nos. is a written short form of是 “numbers”「numbers」的書面縮寫 used when you mean more than one number用在指一個以上的數字時。You put it before the figures你把它放在數字前面 the way you put No. before a single one就像No.放在單一數字前面一樣 “rooms nos. 12–14”「rooms nos. 12–14」 means意思是 “room numbers 12 to 14”「room numbers 12 to 14」（12到14號房）。

People do not really say “nos.” out loud; in speech they just say “numbers”. You will meet it on lists, forms, catalogues, invoices, and older notices.

People do not really say人們不太會把 “nos.” “nos.” out loud唸出來 in speech they just say口說時他們只會說 “numbers”「numbers」。You will meet it on你會在...上遇到它 lists, forms, catalogues, invoices, and older notices清單、表格、型錄、發票和比較舊的公告。

Some writers capitalise it (Nos.) and some do not (nos.); it is the same shortcut. It feels a little formal and a little old-fashioned.

Some writers capitalise it有些人會把它大寫 (Nos.)（Nos.） and some do not也有人不會 (nos.)（nos.） it is the same shortcut但都是同一個縮寫。It feels它給人的感覺 a little formal and a little old-fashioned有點正式又有點過時。

In everyday mail many people now write “numbers”, “#”, or just the figures. It is only a spelling convenience, not a new word with a new meaning.

In everyday mail在日常的信件裡 many people now write現在很多人會寫 “numbers”, “#”, or just the figures「numbers」、「#」，或直接寫數字。It is only它只是 a spelling convenience一種書寫上的方便寫法 not a new word with a new meaning而不是一個帶有新意思的新字。