It took lots of herbicides to make it work but that's another story.
不过，这样做，得用许多除草剂，这又是另一回事了。
Herbicides are difficult to apply horizontally over long distances.
要在长段距离的水平方向施用除草剂也很困难。
More environment friendly as they require less herbicides and pesticides.
环境破坏小，因为种植它们所需要的除草剂及杀虫剂更少。
Many problems are present in these herbicides such as environmental influence, waste water etc.
但此类除草剂也存在不少问题，如对环境影响、废水等。
Many problems are present in these herbicides such as environmental influence, waste water etc.
但此类除草剂也存在不少问题，如对环境影响、废水等。
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