secondary great circle

简明释义

副大圆

英英释义

例句

1.During the navigation seminar, we discussed the concept of the secondary great circle in detail.

在导航研讨会上，我们详细讨论了次大圆的概念。

2.Navigators often use the secondary great circle when planning routes between distant islands.

导航员在规划遥远岛屿之间的航线时，常常使用次大圆。

3.In geodesy, understanding the secondary great circle can help in accurate land measurement.

在大地测量学中，理解次大圆可以帮助进行准确的土地测量。

4.The secondary great circle can be useful for determining the shortest distance between two points on a sphere.

在球体上，次大圆对于确定两点之间的最短距离非常有用。

5.The flight path was adjusted to follow the secondary great circle for better fuel efficiency.

航班路径被调整为遵循次大圆以提高燃油效率。

作文

In the study of geography and navigation, understanding the concept of circles on the Earth's surface is crucial. One of the fundamental concepts is the 'great circle,' which is the largest possible circle that can be drawn on a sphere. It represents the shortest distance between two points on the globe. However, there are other important circles that play a significant role in navigation and mapping, one of which is the secondary great circle. The term secondary great circle refers to circles that are not the primary great circles but still have significant importance in various applications.To better understand the secondary great circle, it is essential to first grasp the idea of a great circle. A great circle divides the sphere into two equal halves and is formed by the intersection of the sphere with a plane that passes through its center. Examples of great circles include the equator and the lines of longitude. These circles are used extensively in air and sea navigation because they provide the shortest path between two points.On the other hand, secondary great circles are those circles that do not pass through the center of the Earth but still maintain a constant radius. They can be visualized as smaller circles that are parallel to the great circles. While they do not represent the shortest distance between two points, they are valuable for various navigational purposes. For instance, they can be used in specific flight paths or shipping routes where certain geographical or political constraints exist.In practical applications, the use of secondary great circles can help in planning routes that avoid restricted areas or hazardous weather conditions. Pilots and mariners often utilize these circles to determine alternative paths that may be more efficient or safer than the direct route suggested by great circles. This flexibility is particularly important in regions where airspace or maritime boundaries are tightly controlled.Moreover, the concept of secondary great circles extends beyond navigation. In cartography, mapmakers must consider these circles when creating projections. Certain map projections distort the representation of the Earth, and understanding how secondary great circles interact with great circles can help in minimizing these distortions. For example, in some projections, maintaining the integrity of secondary great circles can lead to more accurate representations of distances and areas.In conclusion, while the great circle is often highlighted as the primary reference in navigation and geography, the secondary great circle holds its own significance. These circles offer alternative routes and insights that enhance our understanding of the Earth's surface and improve navigation. By recognizing the importance of secondary great circles, we can appreciate the complexity of spatial relationships on our planet and make informed decisions in travel and mapping. As we continue to explore and navigate our world, both great and secondary circles will remain pivotal in our journey towards understanding and connecting with our environment.

在地理和导航的研究中，理解地球表面圆圈的概念至关重要。一个基本概念是“大圆”，它是可以在球体上绘制的最大圆。它代表了地球上两点之间的最短距离。然而，还有其他重要的圆在导航和制图中发挥着重要作用，其中之一就是次大圆。术语次大圆指的是那些不是主要大圆但在各种应用中仍然具有重要性的圆。为了更好地理解次大圆，首先必须掌握大圆的概念。大圆将球体分为两个相等的半球，并由穿过其中心的平面与球体的交集形成。大圆的例子包括赤道和经线。这些圆在航空和海洋导航中被广泛使用，因为它们提供了两点之间的最短路径。另一方面，次大圆是那些不通过地球中心但仍保持恒定半径的圆。它们可以被想象成与大圆平行的较小圆圈。虽然它们并不代表两点之间的最短距离，但在各种导航目的中非常有价值。例如，它们可以用于特定的航线或航运路线，在这些路线中存在某些地理或政治限制。在实际应用中，使用次大圆可以帮助规划避免受限区域或危险天气条件的航线。飞行员和海员经常利用这些圆圈来确定可能比大圆建议的直接路线更高效或更安全的替代路径。这种灵活性在空域或海域边界受到严格控制的地区尤其重要。此外，次大圆的概念超出了导航。在制图学中，制图师在创建投影时必须考虑这些圆圈。某些地图投影会扭曲地球的表示，理解次大圆如何与大圆相互作用可以帮助最小化这些扭曲。例如，在某些投影中，保持次大圆的完整性可以导致距离和面积的更准确表示。总之，虽然大圆通常被强调为导航和地理中的主要参考，但次大圆本身也具有重要意义。这些圆提供了替代路线和见解，增强了我们对地球表面的理解，并改善了导航。通过认识到次大圆的重要性，我们可以欣赏到我们星球上空间关系的复杂性，并在旅行和制图中做出明智的决策。随着我们继续探索和导航我们的世界，大圆和次大圆将在我们理解和连接环境的旅程中继续发挥关键作用。