2 Biggest, Fastest, Smallest, Slowest!

World Book's Learning Ladders Biggest, Fastest, Smallest, Slowest!

世界图书学习阶梯最大，最快，最小，最慢!

Blue whale biggest mammal The blue whale is the biggest animal that has ever lived. It is longer than 2 buses and weighs more than 20 elephants! It lives in the water, but it is not a fish. It is a mammal (an animal that feeds its young with milk). There are blue whales in every ocean in the world. The mouth opens up wide to take in lots of water and food. The main food of the blue whale is a tiny shrimplike animal called krill. Bendable baleen strips hang from each side of its mouth. The strips catch food from the water. The tongue weighs as much as an elephant! The blue whale's throat skin has many grooves so it can stretch like a huge balloon when it is time to eat.

蓝鲸是有史以来最大的动物。 它比2辆公共汽车还长，比20头大象还重!它生活在水里，但它不是鱼。 它是一种哺乳动物(用奶喂养幼崽的动物)。 世界上每个海洋都有蓝鲸。 嘴巴张得很大，可以吸收大量的水和食物。 蓝鲸的主要食物是一种叫做磷虾的小虾状动物。 可弯曲的鲸须条悬挂在它嘴的两侧。 这些条从水中捕获食物。 它的舌头和大象一样重!蓝鲸的喉咙皮肤上有许多凹槽，所以当它吃东西的时候，它可以像一个巨大的气球一样伸展开来。

When a blue whale swims to the water's surface to breathe air, it spouts water up through its blowhole. The water can reach up to 40 feet (12 meters) high! The blue whale moves through the water by waving its strong tail up and down. It's a fact! A blue whole can eat 40 million krill in one day!

当蓝鲸游到水面呼吸空气时，它会通过气孔喷出水。 水可以达到40英尺(12米)高!蓝鲸通过上下摆动它强壮的尾巴在水中移动。 这是事实!一只蓝虾一天能吃掉四千万只磷虾!

Bumblebee bat smallest mammal The bumblebee bat is the smallest mammal. It is about the size of a large bumblebee—that's how the bat got its name! Bumblebee bats live deep inside caves in Southeast Asia. They come out at night to find insects and spiders to eat. It's a fact! Bumblebee bats use sound to figure out what is around them. They squeak and then listen for the echoes that bounce back. The bumblebee bat can hear sounds that are too high for humans to hear. Webbed hand bones are used as wings for flying.

大黄蜂蝙蝠是最小的哺乳动物。 它的大小和大黄蜂差不多——这就是这种蝙蝠得名的原因!大黄蜂蝙蝠生活在东南亚的洞穴深处。 它们晚上出来找昆虫和蜘蛛吃。 这是事实!大黄蜂蝙蝠用声音来判断周围的环境。 它们发出吱吱声，然后倾听反射回来的回声。 大黄蜂蝙蝠可以听到人类听不到的声音。 带蹼的手骨被用作飞行的翅膀。

The thumbs have little claws for hooking and grabbing. The bumblebee bat is also called the hognose bat" because its nose looks like a pig's nose. Soft, warm fur keeps the small body warm. This tiny bat weighs only about as much as two raisins! The bumblebee bat hangs upside-down while resting.

拇指上有小爪子，用来钩住和抓取。 大黄蜂蝙蝠也被称为“猪鼻子蝙蝠”，因为它的鼻子看起来像猪鼻子。 柔软温暖的皮毛让小身体保持温暖。 这只小蝙蝠只有两个葡萄干那么重!大黄蜂蝙蝠休息时倒挂着。