A collie is a medium-sized dog with a long coat, kept as a family pet or trained to move sheep. The Rough Collie is the long-haired “Lassie” look; the Border Collie is the quick, staring sheepdog many people have seen in videos.

A collie collie is a medium-sized dog with a long coat是一種中型、長毛的狗， kept as a family pet or trained to move sheep可以當家庭寵物，也可以訓練來趕羊。 The Rough Collie Rough Collie is the long-haired “Lassie” look就是長毛版、電影《靈犬萊西Lassie》那種樣子； the Border Collie Border Collie（邊境牧羊犬） is the quick, staring sheepdog many people have seen in videos是很多人在影片裡看過的那種動作快、眼神專注的牧羊犬。

It is an ordinary animal word, not slang and not formal.

It is an ordinary animal word這是個很普通的動物用字， not slang and not formal不是俚語，也不特別正式。

Though actually, not every sheepdog is a collie — plenty of farm dogs do that job without the name — and a collie is not a collier, which is a coal miner, a different word that only looks similar.

Though actually不過， not every sheepdog is a collie不是每一種牧羊犬都叫collie — plenty of farm dogs do that job without the name很多農場狗也做同樣的工作，但沒有這個名字 — and a collie is not a collier而且collie不是collier， which is a coal miner collier是指煤礦工人， a different word that only looks similar是長得像但完全不同的字。

The name may come from an old link with coal, because some of these dogs were dark, but that is a “perhaps”, not a settled story.

The name may come from an old link with coal這個名字可能跟煤炭有段古老的關係， because some of these dogs were dark因為有些這種狗毛色很深， but that is a “perhaps”, not a settled story但這只是「也許」，不是定案的說法。