It's an apple-tree-to-be gift set. It has everything needed to grow an apple tree—tree seed, pot, growing medium and directions.

这是一套苹果树的礼品套装。里面有种植苹果树所需的一切--树种、花盆、生长介质和说明。

The first step is to add water and fertilizer to the center of the bale everyday for three days, this begins the process of bacteria -- breaking down the straw into a growing medium.

第一步是，前三天里每天向禾捆中心添加水和肥料，这样细菌就开始生长了，将稻草转化为生长媒介。

Ongoing research is showcasing how green roofs in cities can integrate with 'living walls': environmentally friendly walls which are partially or completely covered with greenery, including a growing medium, such as soil or water.

正在进行的研究正在展示城市的绿色屋顶如何与“生命墙”相结合：部分或完全覆盖着绿色植物的环保墙，包括土壤或水等生长介质。