全國英語等級考試二級閱讀文章段落精選（55）
As the air in the earth's atmosphere swirls around over our heads, the light passing through it from space to earth is continually bent in different directions. This causes a rippling effect, like when you observe something underwater, or look down a hot road in the summer. To our eyes, the stars appear to twinkle.
當大氣中的空氣在我們上方旋動，光線穿過大氣層，從太空照射到地球，并且往不同方向折射，這樣便形成了漣漪般的效應，這就好像你看著水底下的東西，或是在夏天里望著炙熱的馬路，道理是一樣的。所以，在我們眼中，星星在閃爍。
As the air in the earth's atmosphere swirls around over our heads, the light passing through it from space to earth is continually bent in different directions. This causes a rippling effect, like when you observe something underwater, or look down a hot road in the summer. To our eyes, the stars appear to twinkle.
當大氣中的空氣在我們上方旋動，光線穿過大氣層，從太空照射到地球，并且往不同方向折射，這樣便形成了漣漪般的效應，這就好像你看著水底下的東西，或是在夏天里望著炙熱的馬路，道理是一樣的。所以，在我們眼中，星星在閃爍。