为了避免这些问题，一些地方已经将它们的系统介质换为热水。

To avoid those problems, some places have converted their systems to hot water.

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这里的壁板指与系统介质接触的所有压力部件，包括封头、设备口、人孔及人孔盖板。

Shell as used herein shall mean all pressure holding parts of the vessel in contact with the service fluid, including heads, nozzles, manholes and manhole covers.

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但是，通过使用最基本的安装介质，可以保证操作系统恢复到它出厂时的状态。

But by using base media, the operating system is guaranteed to be just it was when it rolled off the factory floor.

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Usually it's done by taking all or part of the infectious agent, and showing them to your immune system in some way.

通常它会带着全部或部分抗原介质,并以某种方式呈递给你的免疫系统

耶鲁公开课 - 生物医学工程探索课程节选