阅读段落
A simple analogy can help us to understand how a rocket operates. It is much like a machine gun mounted on the rear of a boat. In reaction to the backward discharge of bullets, the gun, and hence the boat, move forwards. A rocket motors bullets are minute, high-speed particles produced by burning propellants in a suitable chamber. The reaction to the ejection of these small particles causes the rocket to move forwards. There is evidence that the reaction principle was applied practically well before the rocket was invented. In his Noctes Atticae or Greek Nights, Aulus Genllius describes the pigeon of Archytas, an invention dating back to about 360 B.C. Cylindrical in shape, made of wood, and hanging from string, it was moved to and fro by steam blowing out from small exhaust ports at either end. The reaction to the discharging steam provided the bird with motive power.
段落大意
本段介绍了火箭弹的工作原理以及该原理的起源。
阅读笔记
Operating principle:Like a machine gun mounted on the rear of a boat.
1. GUN: reaction to the backward discharge of bulletsthe boat move forwards.
2. ROCKET:
a. bullets are minute, high-speed particles produced by burning propellants in a suitable chamber.
b. reaction to the ejection of small particlesrocket to move forwards.
Origin of the principle:
360 BC, an invention, the pigeon of Archytas it was moved to and fro by steam blowing out from small exhaust ports at either end.
逻辑关系
1. 比较
in reaction to the backward discharge of bullets, the gun, and hence the boat, move forwards
the reaction to the ejection of these small particles causes the rocket to move forwards
it was moved to and fro by steam blowing out from small exhaust ports at either end
浪漫英文情书精选:Keep You Forever永远温存着你
精美散文:守护自己的天使
双语美文精选:但愿人长久,千里共婵娟
精选英语美文阅读:爱会伴随着度过一生
英语晨读:潘多拉
诗歌:放慢你的舞步
精选英语美文阅读:饶孟侃《呼唤》
双语阅读:回家的感觉真好
精选英语美文阅读:英国民谣《绿袖子》
精选英语美文阅读:山居秋暝
精选英语美文阅读:爱的奇迹 Keep on Singing
精选英语美文阅读:How selfless real love is 无私的爱
英语晨读:雪夜星光
英语美文:越长大越孤独(双语)
浪漫英文情书精选:Good Morning早上好
英语名篇名段背诵精华20
美文欣赏:海边漫步
英语晨读:思考生活
英语美文:生命这个奇迹
英语美文:红色 Red (双语)
浪漫英文情书精选:Don't Give Up不要放弃
英语美文:有良师乃人生之幸(双语)
英语美文30篇系列之21
英语美文:艰难岁月也要满怀感恩之心(双语)
浪漫英文情书精选:Could This Be Real?这是真的吗?
英语晨读:忘忧树
英语晨读:金窗
精选英语美文阅读:别让蜡烛熄灭
精美散文:让我们撩起生命的波纹
“母亲”这个伟大的职业(双语)
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |