outer Lagrangian point外拉格朗日点
first Lagrangian point第一拉格朗日点
inner Lagrangian point内拉格朗日点
N（名词） one of five points in the plane of revolution of two bodies in orbit around their common centre of gravity, at which a third body of negligible mass can remain in equilibrium with respect to the other two bodies 拉格朗日点; 两个天体环绕运行，在空间中有五个位置可以放入第三个物体，并使其保持在两个天体的相应位置上，这样的点被称为“拉格朗日点” [astronomy]