新东方在线雅思网为大家收集整理的雅思阅读长难句每日一题：Day 21。解决长难句是雅思阅读中的重点~希望能够为同学们的雅思备考提供帮助。更多雅思报名官网的最新消息，最新、最专业的雅思备考资料，新东方在线雅思网将第一时间为大家发布。

　　>>>拓展阅读：手把手教你六步搞定雅思阅读长难句分析

　　练习步骤：

　　step1：划分句子结构，找句子主干

　　step2: 确定修饰词，修饰短语或修饰从句的修饰关系

　　step3: 确定代词指代对象

　　剑桥雅思9

　　Reading Passage 2

　　长难句：However, when we look at the 100 billion stars in our galaxy (the Milky Way), and 100 billion galaxies in the observable Universe, it seems inconceivable that at least one of these planets does not have a life form on it; in fact, the best educated guess we can make, using the little that we do know about the conditions for carbon-based life, leads us to estimate that perhaps one in 100,000 stars might have a life-bearing planet orbiting it.