by three days

by three days 基本解释

三天之前

词组短语

1、by three days ago 三天前

2、by three days to go 还有三天

by three days 用法和例句

1、They clipped their visit by three days.

他们把访问时间缩短了三天。

2、The countrys election commission has advanced the date of parliamentary elections by three days.

该国得选举委员会将议会选举日期提前了3天。

重点词汇

three num. 三；三个；第三（章，页等） n. 三岁；三个人[东西]；三，三个 adj. 三的；三个的

days n. 天，时期；一天( day的名词复数 )；白天；时期；工作日 adv. 每天，在白天