Indoor oxygen supply: as an assistant health care measure, oxygen channels are set in semi-valid and invalid healthcare districts, oxygen is available at any time.
氧气入室：在半自理、非自理养护区设有氧气通道，如有需要可随时吸氧，达到辅助治疗的效果。
Not only does it provide positive feedback for our user, it will also semi-protect our web app from bad or invalid input.
它不仅为我们的用户提供了积极的反馈，也为错误或非法的输入给我们的应用提供了一些保护。
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