When younger kids learn computer science, they learn that it’s not just a confusing, endless string of letters and numbers — but a tool to build apps, or create artwork, or test hypotheses.(2016年英语二text1)
例句解析：在此句中，When younger kids learn computer science是when引导的时间状语从句，they learn that it’s not just a confusing, endless string of letters and numbers — but a tool to build apps, or create artwork, or test hypotheses是主句。主句中，they是主语，learn是谓语，that引导的是宾语从句，其中从句是一个主系表的结构，not just a confusing, endless string of letters and numbers — but a tool to build apps, or create artwork, or test hypotheses都是表语部分，其中tool后面是三个to do短语作后置定语，create artwork, or test hypotheses前面省略了to。
重点单词：confusing令人困惑的，hypotheses假说，string线，串。
参照译文：当更小的孩子学习计算机科学时，他们会发现它不仅仅是一串令人困惑的、无穷无尽的字母和数字——而是一个构建应用程序、创作艺术品或测试假设的工具。
