Americans eat twice as much protein as they actually need every day.
比较结构,美国人摄入蛋白质比实际需要的多一倍。
也可理解为倍数表达句式。
如果觉得我的回答对您有用,请随意打赏。你的支持将鼓励我继续创作!
把第二个as看做定语从句的关系代词,例如it is not as good as first meets the eye等