Linguigo · No. 32A2科学3 分钟AI 生成
The Witch Head Nebula and Star Rigel
本篇内容
- – 读一篇关于“科学”的短文
- – 学习 8 个单词
- – 练习 一般现在时 (Present simple)
dust, star, light, blue, shape, nearby, scatter, nebula
点一下不认识的单词。
The Witch Head Nebula is a blue cloud in space. It looks like the head of a witch. People call it a witch because of its shape. The nebula is very big. It is about fifty light-years across. A light-year is the distance light travels in one year.
The nebula is made of gas and dust. A nearby bright star named Rigel shines on it. Rigel is one of the bright stars in the constellation Orion. The star is just below the center of the picture. The blue color of the nebula comes from Rigel’s blue light and the dust. The dust scatters blue light more than red light.
The same thing happens in Earth’s sky. The sky is blue because the air scatters blue light. The air has molecules like nitrogen and oxygen. They scatter blue light during the day. This is why the Witch Head Nebula and our sky are blue.
事实来源：NASA，2026年11月9日 · 原文出处
难句解析
- 1
People call it a witch because of its shape.
“call it a witch” 是“把它称为女巫”的意思，不是“叫它去做女巫”。整句意思是：人们因为它的形状，把它叫做女巫。
- 2
The blue color of the nebula comes from Rigel’s blue light and the dust.
“comes from” 这里不是“来自于某地”，而是“由……产生”。整句意思是：星云的蓝色是由参宿七的蓝光和尘埃造成的。
- 3
The dust scatters blue light more than red light.
“scatter” 在这里不是“分散”或“撒”，而是“使光线散射”。整句意思是：尘埃让蓝光比红光更容易被散射。
本篇语法
一般现在时 (Present simple)
一般现在时表示习惯、经常发生的事和事实：I drink tea every morning. 主语是 he / she / it 或单数名词时，动词要加 -s 或 -es：She works. He watches TV. 否定和疑问用 do / does：I don't like coffee. Does he live here?
I / you / we / they + verb · he / she / it + verb-s
故事中的例句
- People call it a witch because of its shape.
- The nebula is very big.
- The dust scatters blue light more than red light.
常见错误
第三人称单数忘记加 -s（中文动词没有变化）。
She work in a bank.
She works in a bank.
本篇单词
来做个小测验吧？
6 道题，考考你对故事、单词和语法的理解。