减少至18天内英文

“1月18号以后”说法1：after the 18th of January （the 18th of January 是英国的日期读法）说法2：after January the 18th（January the 18th 是美国的日期读法）* 如果月份省略，直接说after the 18th就可以。after 18 days 18天之后（强调在第18天这天的后面的日子）in 18 days 18天后（之后的第18天这天）18 days later 18天之后（过了18天后）希望简单的回答有助你的理解。

一般10天内到货Generally within 10 days of arrival generally 英[ˈdʒenrəli] 美[ˈdʒɛnərəli] adv. 一般地，通常; 广泛地，普遍地; 概括地; 主要地; [例句]University teachers generally have admitted a lack of enthusiasm about their subjects高校教师大体上承认对其所教专业缺乏热情。

and causing the pursuers to rock and toss in t

前者是within three days后者可能有2个，分别是in three days(表未来的3天)，after three days(表过去未来的3天)

within three days三天之内in three days三天之后

Within three days after three days