As a regular household appliance, water heaters have a wide variety of types on the market,In addition to traditional options such as electric water heaters, gas water heaters, and solar water heaters, there has also been a type of water heater called air energy water heater in recent years.This type of water heater uses compressed outdoor air for heating, which is both energy-saving and safe, but it is rarely sought after...

When the Shen-153 astronauts returned home, they also brought "gifts" from the space station to over 20 kilograms of experimental samples on Earth. These experimental samples are very valuable for researchers and will be further studied in the future...