使用银离子作为航天饮用水的消毒剂，其含量直接影响航天饮水的卫生安全。
The content of silver ion affects directly on hygienic safety of drinking water for spaceflight when it is used as disinfectant.
这些人大都很年青，他们整天忙于收集垃圾，喷洒消毒剂，煮饪食物，分发瓶装水，提供急救服务，以及倡导个人卫生等等。
Mostly young people, they spend their days collecting trash, spraying disinfectant, cooking food, distributing bottled water, handing out first aid supplies, and encouraging personal cleanliness.
在一处检查点，有一名卫生防疫人员向汽车喷洒消毒剂。
At one checkpoint, a health worker sprayed cars with disinfectant.
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