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在这个过程中，他们获得了对天花病毒的免疫力。
In the process, they gained immunity to the disease.
youdao
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埃博拉病毒不像天花这类病毒那样容易传播。
Ebola is not as easily spread as viruses such as smallpox.
《柯林斯英汉双解大词典》
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埃博拉病毒不像天花这类病毒那样容易传播。
Ebola is not as easily spread as viruses such as smallpox.
《柯林斯英汉双解大词典》