#U.S. energy secretary says scientific research to 搜索结果
.S.EnergySecretaryStevenChusaidonThursdayheisoptimisticthatscientificresearchwillhelptodealwiththecurrenteconomicandclimatechallenges."Asascientist,Iunderstandtheseriousnessoftheeconomicandclimatecha
05-09