But at least one death was real: cosmonaut Valentin Bondarenko died in a pressure chamber fire during ground training less than a month before Gagarin's flight.
但是至少有一次牺牲是实实在在的：宇航员Valentin Bondarenko在Gagarin飞行前不到一个月的一次地面训练中因气压舱着火而死亡。
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