Zika threat and back from space 寨卡病毒威脅美國，國際空間站宇航員返回地球
本集內(nèi)容
Zika threat to the US 寨卡病毒威脅美國
Back from space after a year 宇航員在國際空間站工作一年后返回地球
文字稿
The threat of the Zika virus reaching the US has come a step closer. Scientists are warning that hundreds of thousands of people in the American territory of Puerto Rico could become infected in the coming months and possibly spread Zika to the US itself.
A Nasa astronaut and a Russian cosmonaut are back on Earth after spending nearly a year on board the International Space Station. Their research will help plan a future manned mission to Mars. ?
