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

政策变济产生任何影响之前，存在漫长且变不定的滞后。

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.

黄褐色的皮肤现在全都被烟和汗水弄得脏兮兮的，结在一起的胡须，还有比之下白得可怕的牙齿，在这炼油间变不定的光影中显得十分古怪。