空氣污染所致?
It’s no question that everyone has looked up at the sky and appreciated a nice, sunny day with blue skies.
每個人都一定曾仰望天空，欣賞過一片晴朗的藍天。
It’s no question that...=毫無疑問appreciate(v.)感激;欣賞
Likewise, a brilliant red sunset is sure to attract its fair share of spectators.
同樣地，豔紅的夕陽肯定也能吸引人駐足觀望。
likewise(adv.)同樣地brilliant(adj.)鮮豔明亮的;聰穎的Everyone says that the man has a brilliant career ahead of him.attract(v.)吸引fair share (of sth.)=理應獲得的份額You will get your fair share of the money.spectator(n.)觀眾
But do you know what is causing these color changes?
但你知道是什麼改變天空顏色的嗎？
cause(v.)導致
Sunlight contains light waves which come in a range of frequencies and wavelengths.
陽光由某一頻率範圍與波長內的光波組成。
contain(v.)含有;包含frequency(n.)頻率The frequency of earthquakes has increased this year.
The frequencies of sunlight we can see fall within the visible light spectrum, which appear white when combined together.
我們看得見的陽光頻率落在可見光譜的頻譜內，這些光結合在一起時就會呈現白色。
fall within=落在某區間內Electronics repair falls within the scope of our service.visible(adj.)可見的;顯眼的Bacteria are only visible when viewed under a microscope.light spectrum=光譜combine(v.)結合;合併
When light waves interact with objects, they can be absorbed, transmitted, or reflected.
當光波接觸物體時會被吸收、傳遞或反射。
interact with...=跟...交流;互相作用或影響absorb(v.)吸收Infants need formula feedings as they cannot absorb nutrients directly.transmit(v.)傳送;傳遞reflect(v.)反射
The light waves with higher frequencies and shorter wavelengths, blues and purples, are absorbed and then transmitted in different directions by the oxygen and nitrogen in our atmosphere, illuminating the sky with these colors.
頻率較高、波長較短的光波，如藍色與紫色會被大氣層的氧氣與氮氣吸收並傳遞至不同方向，以此照亮天空。
direction(n.)方向illuminate(v.)照明;照亮The city has been illuminated with streetlights and neon lights.
As the sun sets, the distance the light waves must travel through our atmosphere to reach our eyes increases.
隨著夕陽西下，光波透過大氣層行進的距離變長。
distance(n.)距離increase(v.)(n.)增加decrease(v.)(n.)減少
The colors that are able to pass through are the ones with lower frequencies, such as reds and oranges.
可穿透大氣層的顏色是頻率較低的顏色，比如紅色與橘色。
be able to RV=有能力做某事