gravitational造句
Its oscillation depends on the strength of the
gravitational field.
它的振动幅度取决于引力场的强度。
the
gravitational pull of the moon
月球的引力
Dark matter gives out no light and is detectable only because of its
gravitational effect on visible matter.
暗物质不发光，它之所以能被发现，只是因为它对可见物质产生引力作用。