gravitational造句
Its oscillation depends on the strength of the
gravitational field.
它的振動幅度取決于引力場的強度。
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.
暗物質不發光，它之所以能被發現，只是因為它對可見物質產生引力作用。