智能仓储物流系统:语法问题

来源:百度文库 编辑:神马品牌网 时间:2024/04/27 16:46:33
The nectar of flowers are ingested by woker bees and converted to honey in special sacs in their digestive systems.

这句话中,"are ingested"为什么是错误的?
谢谢:)

主语是nectar花蜜,不可数名词,应用is ingested