| 簡介：據估計，地球上約有六千多種兩棲類動物。這些動物為何能夠海陸雙棲，又有哪些不為人知的小秘密呢？
Amphibians: Life on Water and Land
The world is filled with fascinating animals, but one
kind is frequently overlooked. These animals are often small, have wet skin, and
start life underwater but end up living on land. These are amphibians, and they
are pretty cool creatures.
There are over 6,800 species of amphibians in the world,
and around 6,000 of those are frogs. They come in many shapes and colors, but they
share some common features. Frogs lay their eggs in the water, and the tadpoles that
hatch from the eggs look like fish and have gills. As they get older, they grow legs
and lungs, which allows them to leave the water. Many species can also take in oxygen
through their skin, though this ability causes them to lose moisture quickly.
兩棲特攻隊
世上充滿了令人驚嘆的動物，但有一類常常被忽略。這些動物通常很小、有溼潤的皮膚，而且剛開始在水中出生但最後在陸地上生活。這些就是兩棲動物，而牠們是很酷的生物。
全球有六千八百多種兩棲類生物，而其中約六千種是青蛙。牠們的外型和顏色有很多種，但牠們有一些共同特色。青蛙在水中產卵，而從卵中孵化的蝌蚪看起來像魚且有鰓。隨著牠們成長，牠們會長出腳和肺，這使得牠們能夠離開水面。許多種青蛙也可以透過皮膚吸收氧氣，雖然這種能力使牠們很快就會失去水分。  |
