Needless_to_say,_the Native Americans resented this, which led to their hostile and brutal treatment by the Spanish.
不用说，美洲当地人对此非常反感，这招致了西班牙人充满敌意和残酷的对待。
(1)【句式分析】 needless to say插入语，本身不作语法成分。插入语属于评注性状语，也叫观念附加语，它不是修饰谓语动词，而是对整个句子进行说明和解释，表明说话人的看法和态度。评注性状语不与它所评注的句子在结构上紧密结合，通常位于句首(间或位于句中或句尾)，常用逗号与句子隔开。
Air as well as sunlight be, needless to say, indispensable to our daily life.
