10.5　NOTES

（1）feedstock：the raw material that is required for some industrial process （送入机器或加工厂的）原料

（2）the pros and cons 赞成和反对的论据、票数(https://www.daowen.com)

（3）cyberport：a place where you can buy digital machines 数码港

（4）hierarchical：classified according to various criteria into successive levels or layers分层的；等级（制度）的