標題: 為什麼冬天會呼出「白霧」? Why Can You See Your Breath When It’s Cold Out? [打印本頁] 作者: liu456 時間: 2022-11-14 21:00 標題: 為什麼冬天會呼出「白霧」? Why Can You See Your Breath When It’s Cold Out? [attach]84215[/attach]
為什麼冬天會呼出「白霧」? Why Can You See Your Breath When It’s Cold Out?
Why Can You See Your Breath When It’s Cold Out?
為什麼冬天會呼出「白霧」? Why Can You See Your Breath When It’s Cold Out?
空氣中的溼度愈高，你呼出的氣就愈能被看見。
目錄 / More to Learn / 中文翻譯(& 答案)
科普園地
Have you ever been in such cold weather that you could see your breath? Did you feel as though you were a mythical creature emitting a cloud of mist each time you breathed out? Well, sorry to ruin your fantasy, but there’s a scientific explanation for this fascinating phenomenon.
As you probably already know, every time you inhale, your lungs absorb oxygen from the air. When you exhale, your lungs put carbon dioxide (CO2) back into the air. The warm air released from your body with each exhalation contains vapor because of the moisture from your lungs, throat, and mouth. The warmth gives the particles of water the energy they need to keep moving rapidly. But when the air outside is cold, the water particles slow down and move closer together, forming little drops of water in the air, which is a process referred to as condensation. These drops of water suspended in the air appear like a cloud under lights, which is why you are able to see them.
How cold does it need to be for you to witness this phenomenon? Actually, there’s no set answer. It depends on other factors, such as the humidity level of the air—the more humid the air, the more visible your breath will be. But generally speaking, you can usually see your breath when the temperature reaches around 7°C or cooler. One tip to see it more easily is to open your mouth wide and exhale from deeper in your throat so that the air coming out will be warmer and carry more vapor.
So, the next time the mercury in the thermometer plummets, step outside, take a deep breath, exhale, and enjoy the spectacle!
1. Which of the following words in the passage means “the transformation of a gas into a liquid”?
(A) Spectacle.
(B) Exhalation.
(C) Phenomenon.
(D) Condensation.
2. Which of the following statements is true about the air exhaled from the human body?
(A) It stops moving if the temperature is too low.
(B) It contains a large amount of oxygen.
(C) It is a gas and normally not visible.
(D) It is completely dry and warm.
3. According to the passage, under which circumstances will you be less likely to see your breath?
(A) Breathing out air on a freezing rainy day.
(B) Releasing your breath when the weather is chilly.
(C) Blowing out your breath when the temperature is below 0°C.
(D) Taking a deep breath under the sunlight and expelling it from the nose.
答案：1.D 2.C 3.D
單字片語整理
Words in Use
●
particle [ˋpɑrtɪk!]
n. 微粒；粒子
●
suspend [səˋspɛnd]
vt. 中斷，中止；吊銷（執照）；垂掛，懸掛
●
absorb [əbˋsɔrb]
vt. 吸收；理解
●
witness [ˋwɪtnɪs]
n. 證人
vt. 目擊
●
humidity [hjuˋmɪdətɪ]
n. 溼氣，溼度
●
transformation [͵trænsfɚˋmeʃən]
n. 變形，轉型
●
vapor [ˋvepɚ]
n. . 蒸氣
●
thermometer [θɚˋmɑmətɚ]
n. . 溫度計
●
spectacle [ˋspɛktək!]
n. . 奇觀
●
mythical [ˋmɪθɪkəl]
a. 神話的；虛構的
●
emit [ɪˋmɪt]
vt. 發出，散發
●
exhalation [͵ɛksəˋleʃən]
n. 呼出
●
condensation [͵kɑndɛnˋseʃən]
n. 凝結
●
mercury [ˋmɝkjərɪ]
n. 水銀
●
expel [ɪkˋspɛl]
vt. （從體內或容器內）排出
●
plummet [ˋplʌmɪt]
vi. 驟降，暴跌
Practical Phrases
●
generally speaking 一般而言
= in general
●
carbon dioxide 二氧化碳
Plants absorb carbon dioxide and produce oxygen.
植物吸收二氧化碳並且製造氧氣。
●
take a deep breath 深呼吸
I always take a deep breath before going on the stage.
我每次上臺前都會深呼吸。
●
be referred to as... 被稱作⋯⋯
The president of the US is sometimes referred to as the chief executive.
美國總統有時被稱作最高行政首長。
●
as though + S + V 好像／彷彿⋯⋯
Tina acts as though she’s tough. In fact, she
is quite timid.
蒂娜表現得好像她很強悍。其實，她膽小如鼠。
More to Learn
breathe [ brið ] vi. 呼吸
breathe out 呼氣
breathe in 吸氣
• The beginner practices how to breathe under water using scuba equipment.
那位初學者練習如何在水下使用浮潛設備呼吸。
以下介紹其他與「呼吸，呼氣」相關的動詞用法:
a. inhale [ ɪnˋhel ] vi. & vt. 吸入
exhale [ ɛksˋhel ] vi. & vt. 呼出(空氣)
• If you inhale those toxic fumes, you will get sick.
如果吸進那些毒氣，你就會生病。
• Before the match, the player took a deep breath and exhaled to ease his nervousness.
在比賽前，該選手深呼吸然後吐氣來緩解緊張。
b. respire [ rɪˋspaɪr ] vi. 呼吸(正式用法)
• To be able to respire underwater, humans need special equipment.
為了能在水下呼吸，人類需要特殊的設備。
c. gasp [ gæsp ] vi. (因驚訝、害怕、疼痛等而)倒抽一口氣/喘息
• I gasped with pain when the nurse gave me a shot.
護士幫我打針時，我痛得倒吸一口氣。
d. pant [ pant ] vi.(因吃力而)氣喘吁吁
• Eddie could not help panting after climbing five floors to the office.