包括两个冷却剂系统水泵在内的备用组件都在舱里，安装工作被普遍认为是艰难的，必须进行两次太空行走。
Spare components are on board, including two coolant system pumps, but installation is considered difficult and two spacewalks will be required.
包括两个冷却剂系统水泵在内的备用组件都在舱里，安装工作被普遍认为是艰难的，必须进行两次太空行走。
Spare components are on board, including two coolant system pumps, but installation is considered difficult and two spacewalks will be required.
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