day /dei/ n.［c］ 1.天，日： three days later 三天后； in a day or two 一两天内； an eight-hour day 8小时工作日 2.星期(几)： What day is it today? 今天是星期几? 3.白天，白昼： before day天亮前 He worked all day. 他工作了一整天。 4.节日： National Day 国庆节； New Year’s Day 元旦 5. 用于短语 all day and all night 整日整夜：He lay in hospital, unable to be asleep all day and all night. 他躺在医院里，整日整夜不能入睡。 day and night日日夜夜： He coughed day and night. 他日夜咳嗽。day off 休假：You cannot take a day off without authorization. 未经批准你不得休假。When the rush was over, he insisted that everybody take a day off. 那一阵忙过之后，他一定要大家休假一天。in the day在白天：Some animals sleep in the day and go out at night.有些动物在白天睡觉，夜里出来。in those days 在过去，在那时代，在那些日子里： In those days we had no electricity. 在过去我们没有电。one day 有一天，某日(可指过去,也可指将来)：One day she came to see me.有一天她来看我。You’ll come to realize it one day.你总有一天会意识到这一点的。the day after tomorrow后天：What will you do the day after tomorrow? 后天你要干什么? the day before yesterday前天：The day before yesterday I went to the city library. 前天我去了市图书馆。the other day 在不久前的某天： The other day I received a letter from a friend of mine. 几天前我从一个朋友那里收到一封信。 these days 现在，如今： Everyone is interested in world events these days. 现在大家都关心世界大事。to a day恰好，一天也不差：It is five years to a day. 刚好五年了。to the day确切的日子：She died ten years ago to the day.他是十年之前的这一天死的。to this day直到今天：I haven’t told him the whole story to this day.至今我还没有把全部经过告诉他。
daylight n.［u］日光： Wear the dark glasses in the daylight.在日光下你要戴墨镜。
daytime n.［u］白天，白 昼(常和the连用)：The daytime in summer is longer than that in winter.夏天的白天比冬天来得长。in the daytime在白天：He worked in the day time, and at night he went to night school.他白天工作，晚上上夜校。
