他们租了一些贫瘠的土地,开始种树。
贫瘠的土地上首先长满了地衣这种低等植物,它们在裸露的岩石上生存。
First to colonize the barren land are the lowly lichens, surviving on bare rock.
但只有那些降落在非常有利位置的孢子才能开始新的生活;绝大多数的孢子降落在贫瘠的土地上。
But only those few spores that settle down in very favorable locations can start a new life; the vast majority fall on barren ground.
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