The rise and fall of the sea level over time has helped form a mound composed of gravel and debris.

加上历史时期海平面的升降变化形成了一条砾石和岩屑组成的连岛坝。

But we all know what really makes the waves in the ocean – the tide. The tide is the rising and falling of the sea.

我们都知道海浪的真正制造者是潮汐。潮汐是指海水的涨落。

The rising and falling of the sea is a constant phenomenon across the world and is obviously a force to be reckoned with within the Suez canal as well.

海平面的上升和下降是世界范围内持续不断的现象，显然也是苏伊士运河内一股不可忽视的力量。

The faint sounds heard only accentuated the silence. The rising and falling of the sea, far away along the coast, was the most important. A minor sound was the scurr of a distant night-hawk.

微弱的声音只是加重了寂静。远在海岸边的海潮起伏最为重要。一个轻微的声音是远处一只夜鹰的呼啸声。