是否能依靠更加先进的生物燃料(比如利用非食物农作物或者利用农作物的纤维素部分、甚至利用柳枝稷或者海藻这些非食物作物来制造生物燃料)来解决上述这些问题还是个未知数。

Those problems might or might not be solved by more advanced biofuels, such as those made from the non-food or cellulosic parts of crop plants or even non-food crops such as switchgrass or algae.

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但结果成功与否还是个未知数，因为这些抗生素往往对人体细胞有害，而且血液中的某些化学物质能够轻易将它们破坏掉。 。

Success, , however, has been elusive because the antibiotics tend to be toxic to human cells and certain chemicals in the bloodstream easily destroy them.

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紧密联系的部位。尽管还有很多未知，后叶增压素似乎与那些更加激烈的关怀，如防御，联系的更加紧密。而催产素则会削弱害怕与紧张的情绪，使人感到愉快与被信任。

Though much remains to be discovered, vasopressin seems to be related more to aggressive care, such as defence, while oxytocin dampens fear and anxiety, which feels good and is associated with trust.

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