Photocopiers are a source of potentially deadly ozone if the filter isn't periodically changed, and even small amounts can cause chest pain and irritation.

如果复印机的过滤器没有定期更换的话，那么它就会产生潜在的致命臭氧，这些有害物质即使数量很少，也会造成胸痛和发炎。

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Photocopiers are a source of potentially deadly ozone if the filter isn't periodically changed, and even small amounts can cause chest pain and irritation.

复印机是潜在的致命臭氧的来源。如果它的过滤器没有定期更换，那么即使是吸入少量臭氧都可以引起胸痛或发炎。

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