1. Sum up the day's news; concluded the lecture By summing up.
   概括了当天的新闻;以扼要的重述结束了报告
2. People's standard of living is higher day by day.
   人民的生活水平日益提高。
3. They lay by during the heat of the day.
   他们在白天最热的时候停下来休息。
4. He lets out cars by the day.
   他按日出租车辆。
5. The supply situation tends to become more tense day by day.
   水供应日趋紧张.

　1个副词解释