A porpoise is a sea animal that looks a lot like a dolphin. It is a mammal, so it breathes air: it comes up, takes a breath, then goes under again.

A porpoise is a sea animal porpoise是一種海洋動物， that looks a lot like a dolphin長得很像海豚。 It is a mammal它是哺乳類動物， so it breathes air所以牠要呼吸空氣： it comes up, takes a breath, then goes under again牠會浮上來、吸一口氣，然後再潛下去。

Though actually, it is not a dolphin. A porpoise is usually smaller, with a rounder head and a short snout — not the long “beak” many dolphins have.

Though actually不過實際上， it is not a dolphin牠不是海豚。 A porpoise is usually smaller porpoise通常體型比較小， with a rounder head and a short snout頭比較圓、吻比較短—— not the long “beak” many dolphins have不是很多海豚那種長長的「嘴喙」。

From a boat, people often just say dolphin for both, and that is how everyday talk works; scientists keep them apart. Porpoises tend to be quieter and less showy.

From a boat從船上看， people often just say dolphin for both大家常常兩種都叫海豚， and that is how everyday talk works日常口語就是這樣講的； scientists keep them apart科學家才會把牠們分開來看。 Porpoises tend to be quieter and less showyporpoise通常比較安靜、不太愛表現。

You meet the word in nature films, aquariums, and news about the sea.

You meet the word你會遇到這個字， in nature films在自然紀錄片裡、 aquariums水族館裡， and news about the sea還有跟海洋有關的新聞裡。

There is a rarer verb, to porpoise, meaning to leap in and out of the water the way this animal does (a plane or a submarine can “porpoise” too), but the animal is the sense that matters here.

There is a rarer verb, to porpoise還有一個比較少見的動詞to porpoise， meaning to leap in and out of the water the way this animal does意思是像這種動物那樣在水裡跳進跳出， (a plane or a submarine can “porpoise” too)（飛機或潛水艇也可以「porpoise」）， but the animal is the sense that matters here不過這裡要學的是指動物的這個意思。