And they called on Google to be clearer about the rules governing AdWords, which experts liken to a "black box".
他们认为谷歌非常清楚广告词项目的控制方式，专家喜欢称之为“暗箱操作”。
2
Thinking over the influence of box beams shear lag effect, making use of the governing different equations and related natural boundary conditions of bending vibration to box girder.
On the basis of the governing differential equations by the variational principles, the finite beam element for analyzing the shear lag effect of box girders is proposed.