These workers are trained in hygiene, first aid, immunization and other essential primary health care services and form the backbone of any emergency health response.

这些卫生工作者在卫生、急救、免疫接种和其他基本的初级卫生保健服务上训练有素，成为应对任何紧急情况的医疗骨干。

youdao

Some have also taken life guard, first aid, food hygiene and swimming pool management courses so they can help keep it going.

BBC: NEWS | UK | Wales | South West Wales | Vandals threaten lido's future