New Words：

herd [hɜːrd] n.牧群；兽群；人群
a herd of 一群（牛、鹿等）

Sample Sentences：

Zebra like to live in herds.
There was a herd of cows in the field
They chased a herd of wild horses on the savanna.

New Words：

savanna [səˈvænə] n. 热带大草原；稀树草原
grassland [ˈɡrɑːslænd] n. 草原;草地;草场

Sample Sentences：

The grassland smelt fresh and sweet after rain.
These pictures tell what the grasslands are like.

More than half of the world's savanna area is in Africa.
The savanna is also the home of meat-eaters--the lion, leopard who feed on the grasseaters.

New Words：

sniff [snɪf]
n.闻；嗅；抽鼻子
v.闻；嗅；抽鼻子

Sample Sentences：

She took a deep sniff of the books.
He lifted his nose and sniffed.
The dog stopped and sniffed at my shoes.
We all had colds and couldn't stop sniffing.
When Floopy meets another dog, they sniff each other for a while.

New Words：

camouflage [ˈkæməflɑːʒ] v.伪装；掩饰
camouflage color 伪装色；迷彩色
camouflage clothes 迷彩服

Sample Sentences：

Nice camouflage. I almost didn't see you.
The soldiers camouflaged themselves with leaves.

New Words：

safari [səˈfɑːri] n. 狩猎旅行
safari park 野生动物园
antelope [ˈæntɪləʊp] n. 羚羊

Sample Sentences：

The antelope ran away when it saw us.
He returned from a safari in Africa yesterday.
We wish him well on his South African jungle safari!