每日翻译： 是埃及人首先采用一年365天的日历，这种日历经过某些改动，今天有许多国家都在使用 。

是埃及人首先采用一年365天的日历，这种日历经过某些改动，今天有许多国家都在使用 。

• It was the Egyptians who first adopted a 365-day calendar, which underwent certain modifications and is now used by many countries.
• The adoption of a 365-day calendar was pioneered by the Egyptians, which has since undergone various changes and is presently utilized by numerous nations.
• The Egyptian civilization was the first to implement a 365-day calendar, which has undergone certain tweaks and is presently employed by several countries worldwide.
• The usage of a 365-day calendar was initially introduced by the ancient Egyptians, and it has since undergone adjustments and is currently utilized by numerous nations globally.
• The Egyptians were the pioneers in adopting a calendar of 365 days, which has undergone some modifications and is now widely used in many countries.

优秀译文：

It was the Egyptians who first used the 365-day calendar, which, with certain changes, is now used in many countries..

• Egyptians: 埃及人
• first: 第一次
• used: 使用
• 365-day: 365天
• calendar: 日历
• which: 用于引导定语从句，指代前面提到的事物
• with certain changes: 经过一些改变
• now: 现在
• many countries: 许多国家

• It was the Egyptians: 这是一个强调句型，用来强调埃及人是第一个使用365天日历的人。
• who: 引导定语从句，修饰先行词"Egyptians"，表示"埃及人是第一个使用365天日历的人"。
• first: 第一次，指埃及人是最早使用365天日历的人。
• used: 使用，表示埃及人使用了365天日历。
• the 365-day calendar: 365天日历，指一种以365天为一年的日历系统。
• which: 引导非限定性定语从句，修饰先行词"calendar"，表示这种日历系统。
• with certain changes: 经过一些改变，表示这种日历系统经过了一些修改。
• is now used: 现在被使用，表示这种日历系统现在仍然在使用。
• in many countries: 在许多国家，表示这种日历系统在许多国家使用。