66天的英文：
sixty-six days
- The lifespan of adults ranges from 3 to 66 days with males ranging from 3 to 50 and females from 14 to 66 days.
成虫的生活历期3～66天，雄虫3～50天，雌虫14～66天。
n. 六十，六十个
adj. 六十的
- The speedometer was rocking between sixty and sixty-five.
里程计在60与65之间来回摆动。 - This dictionary has sixty thousand entries.
这本字典有六万字。 - He was nearing sixty.
他已经快到六十岁了。
num. 六，六个
n. 六，六个；六岁；六点
- Michael Jordan is six feet and six inches tall.
迈克尔·乔丹的身高是六英尺六英寸。 - He will be home at six.
他六点回家。 - Six and falf dozen
半斤八两
n. 一天；白昼，白天；工作日；时代，时期
- Things go on day by day.
事情逐日进行着。 - Day by day the situation is improving.
情况在一天天地好转。 - Like this, day after day.
就这样，日复一日。