Influenza may be prevented by active immunization with a polyvalent killed or subunit vaccine.
可以通过主动免疫接种多价灭活疫苗或亚单位疫苗预防流感.
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It was theoretically predicted that polyvalent anions of C 36 CH 2 had high stability and aromaticity.
从理论上预计C36CH2的高价阴离子具有很高的芳香性和稳定性.
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