For the high-mortality diseases, we had some good news last year, but much of this news is qualified. 对于高死亡率疾 …
noun [ U ] formal uk / mɔːˈtæl.ə.ti / us / mɔːrˈtæl.ə.t̬i / Add to word list. the way that people do not live for ever. 必死性， …
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