布拉格曼说，比如，长期以来，公关员们都努力把坏消息保密到周五下午或假期才公布，以躲开新闻周期。
Publicists, % for instance, have long labored to keep bad news under wraps until Friday afternoons or holidays, in an attempt to duck the news cycle, Mr.
然而另外三个出席这次布拉格峰会的国家-哈萨克斯坦、土库曼斯坦和乌兹别克斯坦据报导没有在这个协议上签字。
But three other countries that attended the summit, Kazakhstan, Turkmenistan and Uzbekistan, have reportedly not signed onto the agreement.
紧接着从声光调制的原理入手，详细的介绍了拉曼·纳斯衍射和布拉格衍射这两种基本的声光作用并给出其理论模型。
And then based on the theory of the interaction of acoustic wave and optic wave, the Raman-Nath and Bragg diffraction are introduced in detail, of which theoretical model is given.
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