例如:his father died the day when he was born.他父亲在他出生那一天去世了。 day and night和night and day,有的词典认为两者意思有些不同:day and night等于continuously,用于以昼为主的场合, night. 1.day after day 的意思是"一天又一天地"。深层意思是"把日子看成连续的，意味着时间长久"的含义。 如：day after day went by and no message arrived. Jun 10, 2024happy day还是happy days 应该在happyday之前用a,即ahappyday快乐的一天，或者可以说happydays快乐的日子。主要是因为day是可数名词，单数出现要在前面用不定冠词，复数出现也.
白天；一天；时代 例句：owls sleep by day and work at night.
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