动物

旁白 neutral

Alligators can be found in the swamps and rivers of the southeastern United States

短吻鳄可以在美国东南部的沼泽和河流中找到。

旁白 neutral

Amphibians like frogs and salamanders live both in water and on land

像青蛙和蝾螈这样的两栖动物既能生活在水中，也能生活在陆地上。

旁白 neutral

Chimpanzees are highly intelligent apes that share many traits with humans

黑猩猩是非常聪明的猿类，与人类有许多共同特征。

旁白 neutral

In ancient times , people used beasts of burden to carry goods over long distances

在古代，人们用驮兽长途运输货物。

旁白 neutral

Dog breeders carefully select traits to produce healthy and temperamentally stable puppies

养狗人精心挑选特征以培育出健康且性格稳定的幼犬。

旁白 neutral

The calf stayed close to its mother as they grazed in the field

牛犊在牧场吃草时紧紧跟着妈妈。

旁白 neutral

A bull can weigh over a ton and is known for its strength and aggression

一头公牛体重可超过一吨，以强壮和具有攻击性著称。

旁白 neutral

Cattle ranchers manage large herds to provide meat and dairy products for consumers

养牛户管理着大群牛，为消费者提供肉类和乳制品。

旁白 neutral

Snakes are cold-blooded reptiles that rely on external heat to regulate their body temperature

蛇是冷血爬行动物，依靠外部热量调节体温。

旁白 neutral

The deep ocean is home to many strange and fascinating creatures

深海是许多奇异而迷人的生物的家园。

旁白 neutral

Domestic cats have been companions to humans for thousands of years

家猫几千年来一直是人类的伙伴。

旁白 neutral

Giraffes use their long necks to reach leaves high up in trees

长颈鹿用它们的长脖子够到高处树上的叶子。

旁白 neutral

guinea pig

豚鼠

旁白 neutral

Guinea pigs are popular small pets known for their gentle nature

豚鼠是受欢迎的小型宠物，以性格温顺著称。

旁白 neutral

A herd of elephants slowly made its way across the savannah

一群大象缓缓地穿越草原。

旁白 neutral

Leopards are skilled hunters that can climb trees to store their prey

美洲豹是技艺娴熟的猎手，能爬树储存猎物。

旁白 neutral

Mules are known for their endurance and are often used as working animals in rugged terrain

骡子以耐力著称，常在崎岖地形中用作役畜。

旁白 neutral

Oxen were traditionally used for plowing fields and pulling carts

牛传统上用于耕地和拉车。

旁白 neutral

Owning a pet can help reduce stress and improve emotional well-being

养宠物有助于减轻压力，改善情绪健康。

旁白 neutral

Spiders use webs to trap their prey , usually insects and small arthropods

蜘蛛用网捕捉猎物，通常是昆虫和小型节肢动物。

旁白 neutral

Primates , including monkeys and apes , have complex social behaviors

灵长目动物（包括猴子和猿类）具有复杂的社会行为。

旁白 neutral

Reptiles such as turtles and crocodiles have scaly skin and lay eggs

像海龟和鳄鱼这样的爬行动物有鳞状皮肤，且产卵。

旁白 neutral

Many plant and animal species are threatened by habitat loss

许多动植物物种因栖息地丧失而受到威胁。

旁白 neutral

A dog wags its tail when it is happy or excited

狗高兴或兴奋时会摇尾巴。

旁白 neutral

Tortoises can live for over 100 years and move slowly on land

乌龟能活100多年，在陆地上行动缓慢。

旁白 neutral

Conservation efforts aim to protect wild animals from extinction

保护措施旨在保护野生动物免于灭绝。

旁白 neutral

Sharks are apex predators that play a crucial role in marine ecosystems

鲨鱼是顶级掠食者，在海洋生态系统中起着关键作用。

旁白 neutral

Whales are the largest mammals on Earth and breathe air through blowholes

鲸鱼是地球上最大的哺乳动物，通过气孔呼吸空气。

旁白 neutral

Some animals , like foxes and rabbits , have thick fur to survive cold winters

有些动物（如狐狸和兔子）有厚实的毛皮以度过寒冷的冬天。

旁白 neutral

Pandas are an endangered species , with only a few thousand left in the wild

大熊猫是濒危物种，野生数量仅几千只。

旁白 neutral

The extinction of the dinosaurs occurred about 66 million years ago

恐龙灭绝发生在约6600万年前。