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✶劃破天際的飛機雲 Contrails: A Trail of Cloud Out of the Blue

Contrails: A Trail of Cloud Out of the Blue
#素養 #數位·科技·科學 #氣候 #娛樂·新奇
4/16 生活英語

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劃破天際的飛機雲 Contrails: A Trail of Cloud Out of the Blue
深究天空中的神祕軌跡
>> ✶三分鐘的祕密 Beyond Vinyl: Exploring the Persistence of the Three-Minute Pop Song
目錄 /
Tips in Use 重點解析
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You Can Do This 英文試金石
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中文翻譯

探索自然 | 本集 精彩教學影片(講解老師:Chris & Antony 老師)

Take a close look at these mysterious track in the sky

      Think of what happens when you are outside on a very cold day. As you breathe in, the air becomes warm inside your body, and when you breathe out, you see a small cloud form. This is the key principle behind condensation trails, or contrails.

  Contrails are left behind by airplanes passing in the sky. However, you may wonder why you see contrails on some days and not on others. As with your breath on a cold day, contrails only appear when planes are flying through cold, humid air. The plane’s engines create and release hot water vapor. When this water vapor hits the cold air at high altitudes, it becomes drops of water. If the temperature is low enough, it may freeze to form tiny ice crystals. These ice crystals are what make contrails visible.

>> ✶品嘗各國筷子的文化 Get a Grip on Chopsticks

    The length and visibility of a contrail depend on conditions in the atmosphere. The colder and damper the air is when a plane flies through, the longer and clearer a contrail will be. On relatively dry days, a contrail will disappear as soon as the plane flies away.

單字片語整理

Words in Use
mysterious
[mɪsˋtɪrɪəs]
a. 神祕的
principle
[ˋprɪnsəp!]
n. 原則,原理;道德原則,行為準則
humid
[ˋhjumɪd]
a. 溼氣重的
engine
[ˋɛndʒən]
n. 引擎;火車頭
atmosphere
[ˋætməs͵fɪr]
n. 大氣;空氣;氛圍
relatively
[ˋrɛlətɪvlɪ]
adv. 相對地,蠻
contrail
[ˋkɑn͵trel]
n. (飛機航行中形成的)凝結尾
condensation
[͵kɑndɛnˋseʃən]
n. 凝結
vapor
[ˋvepɚ]
n. . 蒸氣
altitude
[ˋæltə͵tjud]
a. . (海拔)高度
crystal
[ˋkrɪst!]
n. 水晶 & a. 水晶(製)的;清澈的
visibility
[͵vɪzəˋbɪlətɪ]
n. 能見度
damp
[dæmp]
a. 潮溼的
n. 溼氣(不可數)
vt. 使潮溼
Practical Phrases
leave... behind / leave behind...
 拋下⋯⋯;留下⋯⋯

Sam could not leave behind the fun of city life, so he chose to work in the big city.
山姆無法拋下都市生活的樂趣,所以選擇在大城市工作。

as soon as...
 一……就……

The boy cried as soon as he saw the stranger.
小男孩看到那個陌生人哭了。

♦ 疑問詞引導的名詞子句

疑問詞(what, which, who, why, how, when, where)引導的疑問句可轉換成名詞子句,作主詞、受詞或主詞補語。
★ 疑問句如何轉變為名詞子句:

情  況 轉  換 原  則
問句有 be 動詞 保留疑問詞,主詞與 be 動詞還原。
例:  Where is Judy? → where Judy is
問句有一般助動詞 保留疑問詞,主詞與助動詞還原。
例:  When will you leave? → when you will leave
問句有 do、does、did 等助動詞 保留句首的疑問詞,再將 do、does 或 did 去掉,
其後的原形動詞則按主詞人稱及時態作變化。
例:  Where does Tim live? → where Tim lives
問句主詞為 who、what、which 變成名詞子句時,句構不變。
例:  What happened? → what happened

★ 名詞子句的功能:

1. 作主詞:
例:  What Sam said was not nice.
山姆說的話很不好聽。
2. 作及物動詞或介詞的受詞:
例:  I donʼt remember where my keys are.
我不記得我的鑰匙在哪裡。
3. 置於 be 動詞後作主詞補語:
例:  The important thing is how you handle the problem.
重要的是你如何處理這個問題。

 

請將下列字詞組合成一正確通順的句子
Wet clothes donʼt dry easily _______________________________.
such / weather / in / humid
Charlie is always ________________________________.
in / relatively / a group / quiet
The party began __________________________

 

答案: 1. Wet clothes don’t dry easily in such humid weather.
2. Charlie is always relatively quiet in a group.
3. The party began as soon as everyone arrived.

深究天空中的神祕軌跡。
  回想一下,在寒冷的日子裡當你在戶外時會發生什麼事。當你吸氣時,空氣在你體內變得溫熱,當你吐氣時,你會看到一小朵雲形成。這是凝結尾(亦稱飛機雲)背後的關鍵原理。

 凝結尾是飛機在空中飛過時的遺留之物。但是,你可能很好奇為什麼在某些日子裡看得到凝結尾,在其他日子裡卻看不到。正如同你在冷天中的呼吸一樣,只有當飛機行經又冷又潮溼的空氣時才會出現凝結尾。飛機的引擎產生並釋放熱水蒸氣。當這些水蒸氣在高海拔中遇到冷空氣,會變成水滴。如果溫度夠低,可能會結凍成微小的冰晶。這些冰晶是使人們看得見凝結尾的原因。
  凝結尾的長度和清晰度取決於大氣的條件。當飛機行經時,空氣愈冷、愈潮溼,凝結尾就愈長、愈清晰。在相對乾燥的日子裡,飛機
一經過凝結尾就會消失。

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