指南针英文作文

指南针 The compass is introducedA compass is a simple instrument discrimination range, also known as thecompass, according to "record" on the earliest records appeared in the Warring States period magnetic mountain area. The compass was formerly one of thefour great inventions of ancient China's compass, is the result of ancient Chinese labor people understanding of magnetic objects in the long-term practice.The main components are mounted on a shaft can freely rotate the needle, the needle can remain in the tangent magnetic radial direction on the ground under the action of magnetic field, magnetic needle points to the geographical North pole pole, direction can be identified by this performance. Commonly used in navigation, geodesy, travel and military etc.

指南针的发明在指南针发明之前 人类辨别方向主要靠太阳,月亮等天体,或者山石树木等标志物,然而,这些辨别方向的手段都有其局限性:靠天体辨别方向 在恶劣的天气环境下就无法实现,比如雨天,雾天,阴天.而靠标志物辨别方向 只能局限于小的范围内.后来 人们发现磁石的南北极特性而发明了指南针.从而可以在任何环境下准确的辨别方向.指南针最大的贡献是促进了航海的发展,海上运输的发达以及发现新大陆等指南针都功不可没.The mankind take the bearings to mainly depend the sun before the mariner's compass invent, moon etc. heavenly body, perhaps mountain stone tree etc. marking thing, however, these meanses for taking the bearings all has it to limit sex: is taken the bearings by heavenly body under the bad weather environment and then can't carry out, for example rainy day, fog day, cloudy day.But depend marking a thing to take the bearings can limit at inside small scope. Afterwards people discover the south North Pole characteristic of loadstone but invented mariner's compass.Can take the bearings accurately under any environment thus. Mariner's compass the biggest contribution is to promote maritime development, transport at the sea of flourishing and discover New Continent etc. the mariner's compasses all perform feats