Weak coastal currents keep sewage and industrial waste close to the shore and gently spin floating oil and tar towards the beaches.

微弱的沿海水流使污水和工业废物靠近海岸，并轻轻地将漂浮的油和焦油推向海滩。

Ironically, these green energy producers modelled  their floating turbines off floating oil platforms that use similar engineering techniques  to stay afloat in the middle of the sea.

具有讽刺意味的是，这些绿色能源生产商在浮动石油平台上模拟了他们的浮动涡轮机，这些平台使用类似的工程技术在海中保持漂浮。