| 单词 | tetravalent |
| 例句 | The Philippines’ Food and Drug Administration approved Dengvaxia, tetravalent dengue vaccine, for the prevention of disease caused by all four dengue types in individuals from 9 to 45 years old living in endemic areas. Philippines Approves Dengue Vaccine 2015-12-22T05:00:00Z At this level, clinical investigation conducted in Thailand showed promising data for a tetravalent dengue vaccine. MedidataVoice: Fighting Viral Epidemics: The Long Road To A Dengue Vaccine 2014-12-18T05:00:00Z Other organic compounds which contain tetravalent oxygen are exceedingly active chemically, and there seems to be much to commend this view of the chemical structure of the water molecule. The Chemistry of Plant Life C, Si, Ge, Zr, Th, tetravalent; Ti, tetravalent and hexavalent; Sn, Pb, divalent and tetravalent; Ce, trivalent and tetravalent. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" In many cases it may be connected with basic oxygen, and the salt formation is assumed to involve the passage of divalent into tetravalent oxygen. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" An alternative view, due to Green, is that the oxygen atom of the xanthone ring is tetravalent, a supposition which permits the formulation of these substances as ortho-quinonoids. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" |
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