Numerous field and green house trials are indicative of the benefits of this t
echnology for crop production, as a probiotic in poultry and livestock rations
, and to enhance the composting and recycling of municipal/industrial wastes a
nd effluents.
请问as在这里是“因为”还是“按照”的意思呀？
虽然知道as在这里作连接词使用
但，我不大懂得”，as a probiotic in poultry and livestock ration，”这段子句为
什么以“前后，+as”的形式插入在这段句子中
麻烦Toeic板的各路英雄相助>_<