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.

youdao

当长杆射弹和撞击速度都相同时，与侵彻钢纤维混凝土靶相比，含单层密排刚玉球的钢纤维混凝土靶中的侵彻深度大约降低了11%，而水泥砂浆石靶中的侵彻深度增加了12%。

The penetration depth into SFRC with the board is decreased about 11%, but the penetration depth into cement mortar is increased about 12% as compared with that into the SFRC.

youdao