The Okavango Delta stretches 15,000 square kilometres.

奥卡万戈三角洲绵延15000平方公里。

It covered an area of 800 square kilometres.

受灾区域达800平方千米。

This mammoth markets brawled over one square kilometre.

这个大市场喧嚣鼎沸一平方多公里。

More than 10,000 square kilometres have been destroyed in days.

几天内 一万多平方公里已被烧毁。

He said 6,000 square kilometres had now been recaptured.

他表示，目前已经夺回了六千平方公里的领土。

There can be as many as 40,000 in one square kilometre.

它们的数量可以多达一平方公里4万个。

More than 570 square kilometres of land has been burned in wildfires this year.

今年，野火已烧毁了570多平方公里的土地。

But the biodiversity of the 650 square kilometre park is under threat from invasive species.

但在这六百五十平方公里的公园内，其生物多样性正受到外来物种的威胁。

There are over 7 million people here with 57,000 people per square kilometre in places.

这里有七百多万人，基本上每平方公里达五万七千人。

The tombs, which were built over a period of 247 years, take up 78 square kilometres.

这些陵墓占地78平方公里，历时247多年的时间修建而成。