Troughs in example sentence
The wool was placed in troughs, and upon it fell in turns heavy wooden mallets; such was the machine in question, and such it had been for centuries until the time when the mallets were replaced by cylinders of compression, and the material was no longer subjected to beating, but to regular rolling.
More example sentences with word troughs
So slow down, slow down the speed of the epidemic, and then in the troughs, in between waves, jump on, double down, step on it, and find every case, trace every contact, test every case, and then only quarantine the ones who need to be quarantined, and do that until we have a vaccine. 
