These algal blooms create beautiful patterns that can stretch for hundreds of miles and trace the ocean's swirling currents.

这些藻类在洋面幻变出奇妙的图案，绵延不绝数百英里，而且还会标示出洋流迂回波折的走向。

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Do not swim in where the water is swirling around; there are dangerous currents .

不要在有漩涡的水域游泳，那里有危险的暗流。

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Do not swim in where the water is swirling around; there are dangerous currents.

不要在有漩涡的水域游泳，那里有危险的暗流。

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Without a life jacket she was sucked underwater by swirling currents as the cruise liner capsized.

CNN: Costa Concordia reveals its darkest secrets

The team has already seen swirling patterns in the currents, which may affect models of climate change.

WSJ: A New Wave of Ocean Explorers | Marvels

North Korea's rocket launch suggests important clues about the manner in which Kim Jong Un and his government are attempting to navigate the swirling regional, strategic and domestic currents.

CNN: N. Korea shouts 'look at me' with rocket