And there are long, variable lags before policy changes have any effect on the economy.

化对经济产生任何影响之前，存漫长且化不定的滞后。

Their tawny features, now all begrimed with smoke and sweat, their matted beards, and the contrasting barbaric brilliancy of their teeth, all these were strangely revealed in the capricious emblazonings of the works.

他们黄褐色的皮肤现全都被烟和汗水弄得脏兮兮的，他们纠起的胡须，还有对比之下白得可怕的牙齿，这炼油间化不定的光影中显得十分古怪。