尽管该系统会消耗能源，但它会通过从植物不可食用的部分堆肥产生的沼气将能源回馈给电网。
Although the system would consume energy, it would return energy to the grid via methane generation from composting nonedible parts of plants.
如果一棵树的果子没有人采摘的话，那它们一定不可食用！
If the fruits on such a tree remain unpicked, they cannot be safe to eat!
对我而言，最值得惊叹的莫过于，这些新植物在自然状态下其实是不可食用的，至少很难下咽。
For me, the most surprising thing about these new plants is that in their natural state you very often can't eat them at all, or at least they taste pretty filthy if you do.
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