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.

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