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1·As a result, the book flows thematically, not in aday-by-day chronology.

因此，这本书主题上是连贯的，而不是日复一日的流水帐形式。

2·According to PewResearch, about a third of American teenagers send more than a hundred texts aday.

据皮尤的研究称，大约三分之一的美国青少年每天发送超过一百条短信。

3·He gave her homework in addition to herschoolwork. Shewas allowed to watch only one hour of television aday.

佛蒙·温芙芮对女儿的教育要求非常严格，除学校的作业外，他还给她布置家庭作业，一天只允许她看一个小时的电视。