The solutions must contain the correct balance of all the essential mineral requirements.
The solutions must contain the correct balance of all the essential mineral requirements.
水培溶液必须能够均衡供应植物生长所需的主要矿质元素。
The solutions must contain the correct balance of all the essential mineral requirements.
水培溶液必须能够均衡供应植物生长所需的主要矿质元素。