问题描述: people by their very nature are always on the lookout for intruders 1个回答 分类:英语 2014-11-02 问题解答: 我来补答 y在这里是介词,意为“由于,因为”(as a result of,due to),by their very nature“由于天性,本能地”.People by their very nature are always on the lookout for intruders.人们总在本能地警惕着闯入者. 展开全文阅读