核心内容摘要
undefined variable in line 1：常见于JS文件未声明变量即使用，或HTML中脚本执行早于DOM加载。
robotstxt文件存放位置
Advanced silicon chips power the amazing products we rely on every day. They are the foundation for everything from smartphones and wearables to self-driving cars and machines that learn. As the #1 provider of EDA solutions, Synopsys leads the industry in designing and verifying complex chips as well as designing the advanced processes and models required to manufacture them. Combined with our silicon IP portfolio, our silicon design tools help both hardware designers and software developers deliver superior products.
