Is this a warning for swimmers and divers?

这是对游泳运动员和潜水员的警告吗？

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It is essential for swimmers to learn good breathing skills.

运动员掌握好的呼吸技巧是至关重要的。

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The large bathing hall comprises a pool for swimmers, a learners' pool and a children's pool.

大型洗浴大厅包括了一个游泳池，一个初学者游泳池和一个儿童游泳池。

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In recent years, increasing numbers of Mauve Stinger jellyfish in the Mediterranean have posed a danger for swimmers.

BBC: Deadly jellyfish return to coast

Caine and colleagues are currently pioneering new tracking devices for swimmers, which employ body-mounted gyroscopes and accelerometers in tandem with cameras and sensors around the pool to monitor body position, acceleration, speed and power.

CNN: High-tech kit speeds athletes into new era

Last year at the European Championships, she won seven medals, but du Toit was not competing at the event and has already taken a gold from Gascon at these games -- in the Women's 100m Butterfly S9 class, for swimmers with physical impairments.

CNN: Paralympics 2012: The inspiring women fighting for gold