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在全球水土流失日益加剧的今天,科学家们忧虑的最大问题就是怎样保持随之急剧减少的可耕地面积,他们为此提出了许多方案,其中一种就是人造土壤。俄罗斯科学家们创造出一种被称为“宇宙土壤”的人工土壤,他们利用这种土壤在太空进行了蔬菜种植试验。“宇宙土壤”实际上是
Today, the global problem of soil erosion is aggravating day by day. The biggest issue that scientists are worried about is how to maintain a rapidly decreasing amount of arable land. Many proposals have been made for this. One of them is man-made soil. Russian scientists have created artificial soils called “cosmic soils” that they use to test vegetable cultivation in space. “Cosmic soil” is actually