This is a special torch (手电). It uses light to start fires. You can use it for many things. For example, heating up a pan (平底锅) and cooking food. ……

“舌尖上的浪费”。A nationwide “Clear Your Plate” campaign against wasting food is heating up.A nationwide “Clear Your Plate” campaign against wasting food is heating up. ……

go up because the hot air is lighter than the same amount (数量) of cool air. The trick (窍门) to heating...FLYING garbage (垃圾) bags? That's a funny thought. But it's possible. A garbage bag can become a hot ……

) to heating your balloon is the dark color of the garbage bag. Dark colors absorb (吸收) heat rays from the sun... up more space, the air inside the garbage bag is thinner and lighter than the outside air. So ……

between the food and the heating package, so the food doesn’t become contaminated (被污染的). What runs... the energy transfer process to a self-heating hotpot – there is no contact between the food and the heating ……

the winter as warm as spring, above 16℃.In China, places north of the Yellow River use heating systems... as four months.How to be hotA heating system is a largenetwork(网状系统). There are manypipes(管道) under ……

This bag can heat up food.  WILLTEXIn the cold winter, people always want to have some hot food. Now, Japanese company Willtex has a special bag to heat up (加热) your food. In the cold ……

products.Look for local food suppliers and manufacturers. Transporting food between different countries... ℃. For every degree you lower your heat, California's Energy Commission estimates, you'll save up to 5 per ……

compares the energy transfer process to a self-heating hotpot – there is no contact between the food and the heating package, so the food doesn’t become contaminated (被污染的). What runs through pipes ……

【Listening Cafe】BBCA听力原文：One day a poor farmer was taking a bag of rice to a town. Suddenly, the bag fell from his horse onto the road. He didn’t know what to do because it was too heavy for him ……

that has built-in metal wires, which heat up when electricity is applied. The bag’s inside can reach... also be washed and cut. The bag comes with a battery that can be used for up to eight hours. Users can ……

Every winter, as homes in northern China are warmed up by central heating, a debate emerges over... enough to receive government-supported heating, Xinhua reported. Cities north of the line have coal ……

A: We can't eat all this food.B: You're right. We need a doggy bag.-----------"Doggy bag": 打包袋。以前人们打包剩菜通常是给小狗吃的。所以才会叫doggy bag。 ……

Shi Yuan shows his special waste bag.  PROVIDED TO TEENSShi Yuan shows his special waste bag... to be careful when throwing away wet waste, which may include food or other kinds of garbage. Maybe ……

the food, a soldier pours liquid on one end of the bag. It seeps through the pouch and a membrane...HUNGRY soldiers with limited water supplies and only dried food rations could soon be using dirty ……