Raising fish in space
The Shenzhou XVIII crew (乘组) brought a fish tank (鱼缸) filled with water to the space station. Four zebrafish and algae (水藻) live inside it. The algae give the-fish oxygen, keeping them alive. The tank can also feed the fish, control the temperature and lighting, and collect fish eggs by itself. This mission is special because it features China's first space-based study of water ecosystems. ____
No matter where you are in the world, the BDS (Beidou Navigation Satellite System) can help, guide your way. The BDS is the first navigation satellite system to provide a global short message communication service. In February 2023, a hiker got lost in heavy snow in Inner Mongolia. He sent p text message using the BDS-powered chip (芯片) in his phone and got rescued in time. Work against the cold
In the white, icy world of Antarctica (南极), Chinese scientists worked hard in the freezing cold to do research. Scientists did tests on greenhouse gases and the ozone (臭氧层) in Antarctica. They wanted to see how climate change is affecting (影响) the area. "The hardest part of working in Antarctica was dealing with ‘surprises' from the weather." said one of the teammembers. |
① Provide oxygen. ② Feed the fish. ③Collect fish eggs.
④ Control temperature. ⑤ Fill with water. ⑥Study water ecosystems.
