能夠發電的T恤出現了，散步就能發電
What if your morning run through a park could generate electricity, which could then charge batteries or maybe even power the phone you’re running with? If you’re wearing the right T-shirt, that might be a possibility.
想象一下要是你早上在公園晨跑就能發電，能給電池甚至隨身攜帶的手機充電，會怎麼樣？只要你穿對了T恤，這些都可以實現。
Researchers from the University of Málaga in Spain and the Italian Institute of Technology have designed a T-shirt that generates electricity from the temperature difference between the wearer’s body and their surroundings.
西班牙馬拉加大學和意大利技術研究院的研究人員設計出了一款T恤，能利用人體和周圍環境之間的溫差發電。
That means the body heat coming off you when you run, walk, or play a sport—and the difference between that heat and the colder temperature of the surrounding air—could be transformed into thermal power.
這就意味着用你跑步、散步或運動時身體散發的熱量以及體溫和周圍低溫空氣之間的溫差來發電。
There are a lot of examples of thermal energy in our lives—the sun warming our atmosphere, a stove burner heating a pot of water to boil.
我們生活中有很多熱能：如太陽加熱大氣、火爐把一壺水燒開。
But there are also a lot of examples of wasted warmth, or “waste heat,” which is all the unused heat let out into an environment by machines, electrical processes, or even human activity, that could be used as thermal energy.
但也有很多熱能被浪費掉了，或者稱爲“餘熱”，這些沒有被利用的熱量都被機器、電力加工過程、甚至是人類活動釋放到了環境中，其實都可以被用作熱能。
You can make use of this heat, though, by using something called the thermoelectric effect, which lets you convert temperature differences into electric voltage.
你可以通過熱電效應利用這種熱量，把溫差轉化成電壓。
If two conductors are connected and one side is heated, electrons start to move over to the cooler side, creating a current that flows through the circuit.
連接兩個導體，在一端加熱，電子開始移向較冷的一側，電路中就會產生電流。
Some materials act as conductors that can convert that temperature difference into a power source.
一些材料能充當導體，將溫差轉化成電源。
What this T-shirt does, researchers say, is capture heat coming off of our bodies, which contrasts with the cool air, making electricity.
研究人員說這種T恤的功能就是捕捉在周圍空氣溫度較低時身體散發的熱量，用來發電。
