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So, I have this problem. When I plug my laptop charger into an outlet, that weird box between
the plug and the part where it connects to my computer, it gets super hot, like I can't
even touch it. So, I've invited Audrey Quinn from NPR's
Planet Money team to help explain what's going on with my super-hot laptop charger.
So, Audrey, what's the deal? QUINN: "The first thing you have to understand is
that the kind of power that comes out of your wall is actually different from the kind of
power that your electronics want. It comes out in the form of alternating current
electricity. That means the electrons are pulsing back and forth
And your electronics want what's called direct current power, that's where the electrons
are flowing straight like a river. So, they have to convert it. And when they
do that conversion energy is wasted, so what you're feeling is energy lost in the
form of heat." Okay, so, why can't I just power my laptop with alternating current?
If that's coming out of the wall? QUINN: "Yeah, that works just fine for things like
lightbulbs or a hairdryer, but electronics are a little more complicated.----
If you were to send that alternating current power directly to your laptop, you'd probably
see a puff of blue smoke." Oh god, that sounds bad.
Okay, so, if DC power is so great, why don't we just have it in our houses in the first
place?   This goes back to the late 1800s. There were
two guys who represented the two different kinds of power.
There was Thomas Edison, he was all about DC power, and then there's Nikola Tesla,
he's your AC guy. They're totally duking it out. Every time
a new building goes in, it's kind of this 'oh, what's going to happen? Are they
going to use AC or DC?' What happens eventually is that AC power is
much better at traveling long distances. So, ultimately, the entire power grid gets
set up to spread AC power." But today we have all of these devices.
We have smartphones, we have electric cars, we have tablets, we have computers,
and all these things are hungry for DC power. Do you think we could ever switch back
and maybe realize Edison's original dream
of DC power in every home? QUINN: "The US has one of the best, most reliable
power grids in the world, so people aren't saying 'let's knock out this entire grid.'
You could just have one converter box in your house, and that way you're not converting
AC to DC at the level of every single device." So, if we can reduce the number of conversions
from AC power to DC power, even a little bit, we're going to save a lot of energy.
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你不知道的小事:為什麼充電器會這麼燙! (Why your laptop charger is so hot)

48159 分類 收藏
Ray Du 發佈於 2018 年 2 月 10 日   Ray Du 翻譯   Kristi Yang 審核

影片簡介

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使用充電器的時候,是否常常都會覺得充電器特別地燙?讓這部影片告訴你充電器發熱的原因,迅速了解直流電 (DC) 與交流電 (AC) 的區別以及關於電流的小歷史。

1outlet0:06
這邊的 outlet 可不是暢貨中心,而是指牆壁上的插座。
You should not plug your charger into the outlet when your hands are wet.
你不應該在手是濕的時候把充電器插入插座。

Have you been to the outlets in Taipei that opened recently?
你有去過最近在台北開幕的暢貨中心嗎?


2What's the deal?0:21
影片當中是用來詢問對方這件事情的內幕如何,而這個片語通常是用來詢問別人他們「近來如何」或是「今晚要做什麼?」。What's up? What's going on? What's happening? 也都代表同樣的意思。
I have not seen you for a while, what's the deal?
我挺久沒看到你了,近來如何啊?


deal 有兩種詞性,當動詞用來指「處理」,後面加的介係詞是 with
I have been busy dealing with the final reports.
我最近都在忙期末報告。


deal 當名詞時,則可以指「事情」。
Relax, that's not a big deal.
放輕鬆,這沒什麼大不了的 (這並不是一件大事)。


除此之外, deal 也可以用來指稱「數量」,通常以 a great/good deal of 的片語形式出現:
She has invested a great deal of resources and time on this research.
她已經投入大量的資源和時間在這個研究上。


3in the form of00:33
in the form of 的意思是「以 ... 的形式」。 form 在這個片語當中是指「形式」(n.)。
The final project is presented in the form of video.
最後的作品是以影片的形式呈現出來的。


除此之外, form 作為名詞的時候也可以指「表格」。
Please fill in the form before submitting your application.
請在繳交申請資料之前完成表格。


form 作為動詞的時候,是用來指「形成」。
He is planning to form a new club in the university.
他打算在大學當中成立一個社團。


4duke it out01:34
duke it out 在影片當中是指「一決高下」。
The two delicates have decided to duke it out in this round.
兩位辯士決定在這回合當中一絕高下。


duke it out 還有另外一個意思是指出拳相向,也就是沿用 duke 作為動詞時的原意-據理力爭。
If he did not insist on his absurd claim, the brothers would not have to duke it out.
如果他沒有堅持他荒謬的主張,兄弟們就不會出拳相向了。


當然, duke 最常見的意思是公爵 (n.) 。而 duchess (n.) 則是指女公爵、公爵夫人。
He was granted the title of duke given his brave behaviors during war time.
他因為戰爭時期的英勇表現而被封為公爵。


5realize someone's dream02:04
realize 在這邊是實現的意思,故整句片語代表「實現某人的夢想」。
The entire family is trying hard to realize their grandparents' dream to make the business more prosper.
整個家庭都在努力實現祖父母想讓生意更興隆的夢想。


realize 另外的意思則是「明白、意識到」。
After several setbacks, he has finally realized that this project is too unrealistic.
在多次失敗之後,他終於意識到這個計畫太不實際。


*同場加映:
蜜雪兒·歐巴馬懇請學生重視教育 (Michelle Obama's plea for education)


*同場加映
太陽能比基尼手機充電器 (Charge Your Phone With A Solar Powered Bikini!)


相信看完影片之後,大家都知道為什麼自己的充電器都會發熱了吧!

文/ Leslie
編輯/ Jerry

*Pronunciation Challenge
每日口說挑戰從這部影片節錄一句英文,配上主持人詳細的講解,讓你輕鬆搞懂英文發音!

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  1. UrbanDictionary 俚語字典整合查詢。一般字典查詢不到你滿意的解譯,不妨使用「俚語字典」,或許會讓你有滿意的答案喔