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1·Its total area is 103 thousand square kilometers.

它的总面积是10.3万平方公里。

2·The area covers 1,770 square kilometers. It's about 100 km southwest of Beijing.

该区占地1770平方公里。它在北京西南方向约100公里处。

3·The Sahara, the world's largest desert, is more than 9 million square kilometers in size.

撒哈拉沙漠是世界上最大的沙漠，面积超过900万平方公里。

4·It covers an area of about 1.8 million square kilometers, about one fifth of the national total.

它的面积约180万平方公里，约占全国总面积的五分之一。

5·Together, they can give light to an area of up to 6,400 square kilometers on the Earth for 24 hours.

它们合在一起可以给地球上高达6，400平方公里的区域提供24小时的照明。

6·The largest tropical rainforest is the Amazon Rainforest in South America, which covers 1.2 billion acres, or almost five million square kilometers.

最大的热带雨林是南美洲的亚马逊雨林，它占地12亿英亩，相当于近500万平方公里。

7·Scientists predict that Chengdu could save around 1.2 billion yuan in electricity every year if a new moon lit up 50 square kilometers of the city.

科学家预测，如果一轮新月照亮50平方公里的城市，成都每年可以节省约12亿元的电费。

8·Keya covers 582,646 square kilometers.

科亚占地582，646平方公里。

9·The capital city has an area of less than 1507 square kilometers.

首都的面积不到1507平方公里。

10·All the patches fall within 500 square kilometers in the central Amazon.

所有的小块土地都位于亚马逊中部500平方公里的范围内。