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Solar panels in the mojave desert cover many kilometres .

莫哈韦沙漠里覆盖着数千公里的太阳能电池板。

They are believed to be able to communicate over hundreds of kilometres .

人们相信，它们即使彼此相隔几百千米地也能进行交流。

A long fence runs for hundreds of kilometres across australia .

一个长达好几百米的栅栏绕着澳大利亚穿过.

The continent covers about 24 million square kilometres .

这个大陆覆盖了240万平方公里。

Europe covers about 10 million square kilometres .

欧洲覆盖了大约一千万平方公里的土地。