而且本次衰退的几个特点危害性尤为大。
And several features of this recession look especially harmful.
代理人有以下几个特点。
有位教授就她的研究中的几个特点提了问。
One professor asked about several of the distinctions in her research.
And that was possible in smallpox because of a few characteristics of the disease: one is that it's a--it's purely a human disease, humans are the only organisms that are affected by it.
天花能够被根治的原因在于,这种疾病具有以下几个特点,一是,它是一种只有人类才得的疾病,人类是唯一受天花感染的生物
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