疫苗灌装和发放：将每批疫苗稀释以得到所需的抗原浓度，然后装瓶或灌入注射器，并加贴标签。
Vaccine filling and release: the batch of vaccine is diluted to give the desired concentration of antigen, and put into vials or syringes, and labeled. A number of these are then tested.
如果稠密的黏液可以被稀释成低浓度的，气管、细支气管和肺中的细毛就都能把它向上推送，咳嗽就不会发生。
If the thick mucus could be diluted into a more WATERY consistency, it would be wafted upward by the tiny hairs in the wind pipe, bronchioles, and the lungs. Coughing would not occur.
这种办法的另一个好处在于，产生的水蒸汽能够稀释周围空气中的氧气浓度，从而抑制火焰的燃烧。
As a bonus, the steam also smothers the flames by diluting the amount of oxygen in the surrounding air.
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