-
1.The planetary cooler is designed to keep the temperature constant in space.
行星冷却器旨在保持太空中的温度恒定。
-
2. The planetary cooler was a revolutionary invention that improved the efficiency of spacecraft.
行星冷却器是一项革命性的发明，提高了航天器的能效。
-
3.The planetary cooler was used to cool down the spacecraft during long-duration missions.
行星冷却器被用于在长时间任务期间为航天器降温。