Вот перевод вашего текста на английский язык:
"To wash themselves, astronauts use a vacuum shower. Muscles become weak in gravity, so they spend time training. They put dirty dishes into bags and send them back to Earth. Bacteria multiply quickly in microgravity, and they need to clean every day. To sleep, astronauts are strapped to their sleeping bags with a belt. Food trays are secured to their legs. In their free time, they read books and watch movies. They love to take pictures of the Earth the most."
Если у вас есть другие вопросы касательно учебного материала, не стесняйтесь спрашивать!