They moved easily and quickly, because the moon's gravity is six times less than Earth's.

VOA: special.2009.07.15

It's wrong to think that you feel weightless because you escaped the pull of gravity.

但是要是你认为失重,就是不受重力那就大错特错了

耶鲁公开课 - 基础物理课程节选

When Shepard did hit the golf balls, they traveled "for miles and miles," as he reported, because the gravity on the moon is one-sixth of the gravity on Earth.

VOA: special.2011.05.15