20世纪20年代末无声电影向有声电影的转变标志着迄今为止电影史上最重要的转变。
The shift from silent to sound film at the end of the 1920s marks, so far, the most important transformation in motion picture history.
迄今为止，世卫组织已已让六级流行警告级别保持在5级不变，表明一场流感大流行迫在眉睫。
The WHO has so far left its six-level pandemic alert scale unchanged at phase five, signalling that a pandemic is "imminent."
迄今为止，世卫组织已安排三次运送这些设备；更多的货运正在途中。
WHO has arranged three shipments of this equipment to date; more shipments are on their way.
应用推荐