The air is turning brisk, the leaves are changing colors and the sleeping bags are ready to be packed!
空气渐渐变得清爽，树上的叶子转变了颜色，是时候准备好露营睡袋啦！
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Rockets are tall, but not particularly wide.With inflatable spacecraft, the structure can be packed tightly into the payload and then filled with air once in orbit.
Rockets are tall, but not particularly wide. With inflatable spacecraft, the structure can be packed tightly into the payload and then filled with air once in orbit.