the iron content of tomato sauce cooked in an iron pot for three hours showed a striking increase, the level going up nearly 30 times.
“the level going up nearly 30 times” going up ,是什么用法,为什么要ing呢,我知道该句子谓语是showed,实在不明白going是什么用法
能否给出详细的非谓语用法的解释,谢了,
还有,coffee can interfere with iron being absorbed into the body.
这个being 又当如何理解呢。谢谢 ,回答的越具体越好,不要太笼统,回答得好,肯定多加分,谢谢了