There is no evidence whatever that competition in broadcasting has ever reduced costs...没有任何证据表明，广播业的竞争使成本有所降低。Digital TeleVision ( DTV ) broadcasting is realized by satellite, cable and terrestrial wireless.数字电视广播主要通过卫星...
To study pharmacokinetics and availability of national - apramycin sulfate by oral and intravenous administration in 5 pigs.对5头健康猪口服和静脉注射国产硫酸安普霉素,研究其在猪体内的药代动力学和生物利用度....
A new viewpoint of chemical - and - plant integrative fixation is put forward.提出了开展化学 - 生物一体化固沙新观点.In the course of its development, an integrative aggregative tension appeared.在教育政治学发展的过程中, 出现了两种张力:整合的张力和多元的张力.Hence ena...
The hummingbird is the only bird that can fly backward.蜂鸟是唯一能倒退向后飞的鸟.The wings of a bee and those of a hummingbird are analogous.蜜蜂的翅膀和蜂雀的类似.The hummingbird perches on a twig of the hawthorn.小蜂鸟栖在山楂树枝上.A hummingbird is p...