PJ's (also written PJs, pjs, or pj's) is a casual short form of pyjamas — the soft trousers and top you sleep in. People say it at home, in shops, and in ads; it is friendly and a bit childlike, though adults use it too.

PJ's (also written PJs, pjs, or pj's)PJ's（也寫作PJs、pjs、或pj's） is a casual short form of pyjamas是pyjamas的口語簡稱 — the soft trousers and top you sleep in就是你睡覺穿的那種柔軟長褲和上衣。People人們 say it at home, in shops, and in ads在家裡、店裡、廣告裡都會這樣說; it is friendly and a bit childlike聽起來很親切、有點孩子氣, though adults use it too不過大人也會用。

You put on your PJs, stay in your PJs, live in your PJs on a lazy Sunday.

You你 put on your PJsput on你的PJs, stay in your PJsstay in你的PJs, live in your PJs on a lazy Sunday在悠閒的星期天live in你的PJs。

The spelling wobbles because English cannot decide how to write the short form of a word that already has two spellings: British pyjamas, American pajamas. The apostrophe in pj's once marked the missing letters, but many people now write PJs with no apostrophe, the way they write TVs.

The spelling wobbles拼法會搖擺不定 because English cannot decide how to write the short form of a word因為英文沒辦法決定一個字的簡稱該怎麼寫 that already has two spellings這個字已經有兩種寫法: British pyjamas, American pajamas英式pyjamas、美式pajamas。The apostrophe in pj's pj's裡的撇號 once marked the missing letters本來是標記省略的字母, but many people now write PJs with no apostrophe但現在很多人寫PJs時不加撇號, the way they write TVs就像寫TVs一樣。

It is spoken English more than school English; a form will usually say pyjamas or pajamas, not PJs.

It它 is spoken English more than school English是口說英文多過學校英文; a form表格上 will usually say pyjamas or pajamas通常會寫pyjamas或pajamas, not PJs不會寫PJs。