实在看不懂the corona rays are made up of gases你说光线怎么可以由气体组成,还有the ray of gas,
the corona rays are made up of gases streaming outward at tremendous speeds and reaching a temperature of more than 2 million degrees Fahrenheit.The rays of gas thin out as they reach the space around the planets.By the time the Sun’s corona rays reach the Earth,they are weak and invisible.