??amphibian coming from the root- amphi- meaning both. also, the root -bio- meaning life.
amphibian 这个单词来自于字根“amphi”，意为“两者都”。此外，字根“bio” 意为“生命”。
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amphibians are creatures that live in water and on land.
两栖动物是即可生活在水里也可生活在陆地上的生物。
meet the amphibians
type of amphibians:
两栖动物的种类：
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frogs
青蛙
blue frog
frogs have smooth wet skin.
青蛙的皮肤光滑湿润。
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frogs have long legs to jump far.
青蛙腿长长的，跳得很远。
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toads.
蟾蜍
woodhouse toad
toads have dry bumpy skin.
蟾蜍有干燥又粗糙的皮肤。
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toads legs are short, they usually hop.
蟾蜍的腿短，他们常常蹦着跳。
differences of frog & toad
salamanders:
有尾目科：
salamanders
salamanders have tails and look like lizards.
有尾目科有尾巴，长得像蜥蜴。
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salamanders crawl on land.
有尾目科在陆地上爬行。
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they have soft moist skin.
它们有柔软而湿润的皮肤。
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newts (some salamanders are newts, but not all salamanders are newts):
蝾螈（有些有尾目是蝾螈，但不是所有的有尾目都是蝾螈）
newts
newts have dry skin. they can regenerate body parts, like eyes and limbs. even the heart.
蝾螈的皮肤较干燥。它们的身体部位可以再生，比如：眼睛和四肢，甚至是心脏
caecilian:
无足目科
caecilian
caecilians live underground and burrow and wiggle.
无足目科生活在地下，挖洞，扭动前行。
they look like worms.
它们看起来像蠕虫。
most amphibians have the same cycle:
大多数两栖动物的周期相同：
life cycles
life cycles of a frog.
青蛙的生命周期。
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frogs start life as eggs.
青蛙的生命从卵开始。
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then change to tadpoles.
然后变成蝌蚪。
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after a few months the tadpoles grow legs.
几个月后，小蝌蚪长出四条腿。
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their tails get smaller.
它们的尾巴变小了
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after around 4 months the tadpole has become a frog.
大约4个月后，小蝌蚪变成了青蛙。
life cycles
caecilians are similar in life cycle but they sometimes lay eggs in wet soil.
无足目科的生命周期相仿，但有时它们会在潮湿的土壤中产卵。
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also, some of them take care of their young by feeding them their own skin.
此外，它们中有一些种类会用自己的皮肤来喂养幼虫。
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one special amphibian is a type of salamander.
两栖动物中有一个特别的品种，它是蝾螈中的一员。
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also called the walking fish.
也被称为叫“行走的鱼”。
axolotl
the axolotl
它就是墨西哥钝口螈
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although they can mature and leave the water.
虽然它们成熟后可以离开水生活。
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they choose not to, and most remain with gills and lungs.
但是它们选择留在水中，并且它们中大多数都有鳃和肺。
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happy to live under water.
在水中开心的生活。
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another fun fact, they can regenerate any part of their body with no scar.
另一个有趣的事实，它们可以让身体的任意部位重生，而不留下疤痕。
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amphibians diet.
两栖动物的食物。
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amphibians are insectivores or carnivores
两栖动物捕食昆虫或肉类
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insectivore means: eating flies and insects.
食虫指的是：吃苍蝇和昆虫。
frog hunting
some toads can use their long sticky tongues to catch insects.
有些蟾蜍可以用它们长长的粘粘舌头来捕捉昆虫。
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others hide until food comes near.
另一些选择躲起来，等食物靠近。
bullfrog attacks
many amphibians have camouflage.
许多两栖动物都有伪装。
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they can hide very well.
他们可以隐藏得很好。
hidden frog
some amphibians are very bright.
有些两栖动物非常聪明。
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this warns other animals “don’t eat me, i’m toxic”
这警告其他动物”不要吃我，我是有毒的。”
poison dart frog
the golden poison frog is the most poisonous vertebrate in the world.
金色箭毒蛙是世界上最毒的脊椎动物。
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golden dart- very dangerous
some amphibians are very small.
有些两栖动物体型非常小。
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paedophryne amanuensis (no common name)
阿马乌童蛙（以上拉丁学名，无英文俗称）
is only 7.7millimetres long.
它的身体只有7.7毫米长。
paedophryne amanuensis
it is very hard to find; it sounds like an insect.
很难找到;叫起来像昆虫
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it comes from papua new guinea?
它来自巴布亚新几内亚
at the other end in terms of size.
反之，有些体型非常大。
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the giant salamander. ?????????
大鲵
chinese giant salamander
the chinese giant salamander has been known to grow to 1.8 meters in length.
据了解，中国大鲵可以长到1.8米长。
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they can live for up to 75 years.
它们可以活长达75年。
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they are not good pets.
它们不太适合当宠物。
frog jumping
frogs can jump, and some are very good at it.
青蛙会跳，有些品种特别很擅长跳。
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tree frogs can jump 150 times their own body length.
树蛙可以跳150倍于自己的身体长度的距离。
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there are over 5000 different kinds of amphibian in the world.
世界上有5000多种不同类型的两栖动物。
olm salamander
many are endangered.
许多濒临灭绝。
vocabulary:
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