最后给出弹弓式底座下大梁的设计计算实例。
And as an example, the design of a set of bowed lower beams of substructure is presented.
这些航天器全都使用了射弹弓式的引力辅助方法，从而在外太阳系中提高速度。
All these spacecraft have used sling-shot style gravity assist maneuvers to increase their speeds through the outer solar system.
这些航天器全都使用了射弹弓式的引力辅助方法，从而在外太阳系中提高速度。
All these spacecraft have used sling-shot style gravity assist maneuvers to increase their speeds through the outer solar system.
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