一：北_南_回归线的是什么意思（中英文）解释的意思：

北_南_回归线是指地球上的一个虚拟线，它是北纬23°26′和南纬23°26′之间的经线，也被称为夏至回归线。这条线将地球分为北半球和南半球，它标志着太阳直射点在夏至时从南半球移向北半球。在地理学和天文学中具有重要意义。

The Tropic of Cancer, also known as the Northern Tropic, is an imaginary line on the Earth located at 23°26′ north of the Equator. It marks the northernmost point where the sun can be directly overhead and is also known as the Summer Solstice. This line divides the Earth into the Northern Hemisphere and Southern Hemisphere and has significant importance in geography and astronomy.

二：怎么读（音标）：

Tropic of Cancer [ˈtrɑpɪk əv ˈkænsər]

三：用法：

北_南_回归线通常用来表示地理位置或者天文现象，也可以用来说明某个或地区的气候特征。在旅游指南和地图上也会标注出这条线，帮助人们更好地了解所处位置。

The Tropic of Cancer is commonly used to indicate geographical locations or astronomical phenomena. It can also be used to describe the climate characteristics of a country or region. It is often marked on travel guides and maps to help people better understand their location.

四：例句1-5句且中英对照：

1. The Tropic of Cancer passes through the countries of Mexico, Bahamas, Egypt, Saudi Arabia, India, and China.

北_南_回归线穿过墨西哥、巴哈马、埃及、沙特、印度和等。

2. During the summer solstice, the Tropic of Cancer receives the most direct sunlight and experiences its longest day of the year.

在夏至时，北_南_回归线接收到最直接的阳光并经历一年中最长的一天。

3. The Tropic of Cancer is one of the five major circles of latitude that divide the Earth into different climate zones.

北_南_回归线是将地球分为不同气候带的五条主要纬线之一。

4. The city of Cancun in Mexico is located just a few kilometers north of the Tropic of Cancer.

墨西哥的坎昆市位于北_南_回归线以北几公里处。

5. Many ancient civilizations have built structures to align with the Tropic of Cancer during significant astronomical events such as solstices.

许多古代文明在重要的天文如夏至时，都会建造与北_南_回归线对齐的建筑物。

五：同义词及用法：

除了Tropic of Cancer这个正式名称外，北_南_回归线也可以被称为Northern Tropic、Tropic of the Sun、夏至回归线等。它们的用法和意思都相同，只是名称不同。

In addition to the formal name Tropic of Cancer, this line can also be referred to as Northern Tropic, Tropic of the Sun, and Summer Solstice. They all have the same meaning and usage, only with different names.

六：编辑总结：

北_南_回归线是地球上的一个重要虚拟线，它标志着夏至时太阳直射点从南半球移向北半球。它在地理学和天文学中具有重要意义，在旅游指南和地图上也会被标注出来。除了正式的名称Tropic of Cancer外，还有其他同义词可以表示这条线。了解北_南_回归线的意义和用法，可以帮助我们更好地理解地球的构造和气候变化。