The year of 2023 marks the 20th anniversary of China's first manned space mission, with Yang Liwei (become) the first Chinese astronaut to go to space in 2003. Since then, another 19 astronauts (reach) for the stars. Experts revealed how tough the training is before astronauts soaring to space.
The human body is not designed for space life. Astronauts are faced with multiple challenges. The changes in gravity can have an impact their bodies.The confinement(封闭）in a small spacecraft can damage their mental health. (emergency) challenge their knowledge and ability. So astronauts have to meet (extreme) high standards and go through a tough training program.
To make sure astronauts complete their missions and return to Earth safely, eight types, including over 200 subjects of training, were set. Apart from physical fitness training, it also contains (base) scientific theories, psychological health,and mock(模拟的)missions.
makes the training the most tiring is underwater training. "This training is designed for astronauts (adapt) to the micro-gravity environment. Astronauts stay underwater in suits weighing over 100 kilograms for six hours at time. Water resistance and the heavy suit make astronauts (exhaust).
Each astronaut receives training for at least three and a half years before having the chance to go to space.
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