1. 哲学，心理学，微积分以及其他的抽象学科不得不从书本当中学习，或主要来源于书本。
(教育话题; 难度：★★★★★)
Some knowledge, such abstract subjects as philosophy, psychology, calculus, is bound to be learned from books, or primarily from books.
2. 电视，这项以迅速变化和成长为标志的最普及和最有影响力的现代技术，正在步入一个极为成熟和多样化的时代，这将重塑我们的生活和世界。
(科技话题; 难度：★★★★★)
Signed by the rapid change and progression, TV, the most prevalent and impacted modern technology, is stepping the era of tremendous mature and versatility, which will re
