英语中的非谓语动词相关问题Grown in Africa and air freighted to markets, flowers are an important component in the economies of several African nations.这是课本中的一句话,Air freighted to markets是怎么个用法啊,我知道是非谓语,并且是the flowers are freighted to markets.所以如果开头是Freighted to markets我可以理解,但是freighted前面为什么加个air?语法上怎么解释啊?