In microgravity, osteocytes aren't getting much loading stimuli, because less gravity means less weight.

在微重力下，骨细胞不会受到太多负荷刺激，因为重力越小意味着体重越轻。

For example, the crust beneath Iceland and the mid-Atlantic ridge is more dense than in the Indian Ocean, which means more mass, which means stronger gravity in the N. Atlantic.

例如，冰岛下的地壳和大西洋中洋脊就比印度洋密度更高，这代表它们具有更多质量，也就有更大重力。

Except the interior of the earth doesn't have the same density everywhere, which means gravity is slightly stronger or weaker at different points around the globe, and the oceans tend 'puddle' more nearer to the dense spots.

只不过地球内部各处的密度不同，这意味着地球上不同地点的重力有小幅波动，并且海洋在密集处聚集的更多。