Subtitles section Play video
-
Because gravity gets weaker at longer distances, the moon pulls the near-side ocean more than the Earth
因為距離愈遠，引力愈小。因此相較於地球，靠近月球那側的海水較易受吸引。
-
and the Earth more than the far-side ocean.
而相較於另一端的海水，地球較易受月球引力吸引。
-
When the Earth spins relative to the moon, the water sloshes, and we call it the tides.
當地球相對於月球運動時，會造成海水晃盪，我們稱之為潮汐。
