Read again for the writer's purpose of the text by answering the following questions.
再读一遍文章，并通过回答以下问题来了解作者的写作目的。
2
You could limit distractions by reading only physical books, or on single-purpose e-readers.
你可以通过只阅读实体书或单一用途的电子阅读器来减少分心。
3
By 1967, dual-purpose ships, carrying loose cargo in the hold and containers on the deck, were giving way to all-container vessels that moved thousands of boxes at a time.