Name: 動物生命週期 (Animal Life Cycles)
Uploaded: 2025-05-15T17:37:00.000Z
Duration: 2 min 16 s

它們各自經歷著不同的生命週期。

There are many different species of invertebrate, but they all begin life as an egg.

無脊椎動物有許多不同的種類，但它們的生命都是從卵開始的。

Then they hatch into larva, develop into a pupa and grow into an adult.

然後，它們孵化成幼蟲，發育成蛹，再長成成蟲。

They hatch into larva, then become a fry where they can feed independently.

它們孵化成幼蟲，然後變成魚苗，可以獨立覓食。

Later, they become a juvenile and develop the bodily characters of a fish.

後來，它們變成了幼魚，並形成了魚的身體特徵。

They become an adult when they can reproduce and then they spawn, which means that they produce eggs and milt to create fertilised eggs.

當它們能夠繁殖時就會成為成蟲，然後產卵，這意味著它們會產卵和泌乳以產生受精卵。

All amphibians begin life in water as an egg.

所有兩棲動物都以卵的形式在水中開始生命。

They then develop gills as a young amphibian and reach adulthood when they can reproduce.

然後，它們作為兩棲動物的幼體長出鰓，成年後就可以繁殖後代。

Birds and reptiles also lay eggs, but both animal types stay inside the eggs as embryos until they are fully developed.

鳥類和爬行動物也會產卵，但這兩種動物都是以胚胎的形式待在卵內，直到完全發育成熟。

Only then will they break open the eggs from the inside and hatch out.

只有這樣，它們才會從裡面破卵而出。

When the eggs hatch, the newborn birds and reptiles are vulnerable.

鳥蛋孵化後，新生鳥類和爬行動物很容易受到傷害。

The birds rely on their parents to provide food, whereas the reptiles are left to fend for themselves.

鳥類依靠父母提供食物，而爬行動物只能自己照顧自己。

Mammals are the only animal that does not lay eggs.

哺乳動物是唯一不產卵的動物。

Instead, the fertilised egg grows into an embryo and into a baby inside the female.

相反，受精卵會在女性體內成長為胚胎和嬰兒。

The newborn progresses into childhood and grows into a young adult teenager.

新生兒進入童年，成長為少年。

It reaches adulthood when it is able to reproduce. .

當它能夠繁殖後代時，它就成年了。.

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動物生命週期 (Animal Life Cycles)