太多计算机，太多电子邮件及各种发明。
There are too many computers, too many emails, and too many devices.
罗森先生的书不是一部关于各种发明的历史，而是对于发明本身——即拿现有的机制做实验并使之改善的过程——的研究。
Rather than a history of inventions, Mr Rosen’s book is a study of invention itself, the process of tinkering with an existing mechanism to make it better.
他可以在米粒、板栗种子甚至还能在人的头发上写字，还发明了各种必要的微型工具去完成佳作。
He worked out how to write on rice grains, poppy seeds even human hair, and created the necessary micro-instruments to do this.
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