空间站将会有一个备用的力矩控制陀螺仪，一个备用的氮气储罐群和一个备用的氨储罐群。
There will be a spare control moment gyroscope, a spare nitrogen tank assembly and a spare ammonia tank assembly.
也有备用氨储罐群，1个备用的伸缩软管扭转耦合器，几个远程电源控制组件，甚或有1个用于专用灵巧机械手的备用手臂。
There's a spare ammonia tank assembly, a spare flex hose rotary coupler, several remote power control modules and even a spare arm for the Special Purpose Dexterous Manipulator.
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