A ditty is a short, simple song or a little poem you can almost hum after one hearing.

A ditty ditty is是 a short, simple song or a little poem一首短短的、簡單的歌，或一首小詩， you can almost hum after one hearing你聽一次差不多就能哼出來

People usually say it with a smile — “a little ditty” — meaning the thing is catchy and light, not serious concert music. You hear it of a folk tune, a children’s rhyme, or a silly song someone made up on the bus.

People usually say it with a smile人們通常會帶著微笑說 — "a little ditty" —「a little ditty」—— meaning the thing is catchy and light意思是這東西朗朗上口又輕鬆， not serious concert music不是嚴肅的音樂會音樂 You hear it of a folk tune, a children's rhyme, or a silly song someone made up on the bus你會聽到用它來講民謠、兒歌，或有人在公車上隨口編的傻歌

It is slightly old-fashioned and almost always playful; younger speakers more often just say “a little song.” Though actually, in older English a ditty could also mean the words of a song, not only a cute short one.

It is slightly old-fashioned and almost always playful這個字有點老派，幾乎總是帶點玩鬧的意味； younger speakers more often just say "a little song."比較年輕的人更常直接說「a little song」。 Though actually不過其實， in older English a ditty could also mean the words of a song在比較舊的英文裡，ditty也可以指一首歌的歌詞， not only a cute short one不只是可愛的短歌

You would not use it for a national anthem or a long ballad you are treating with respect.

You would not use it for a national anthem你不會用它來講國歌， or a long ballad you are treating with respect或一首你很認真看待的長篇敘事歌