The persistent yammer of a motor horn drew Martin to the window of the laboratory, a late afternoon in February.
So they straggled through the Montana wheatland, whole duchies of wheat in one shining field, through the cattle-country and the sagebrush desert, and suddenly, staring at a persistent cloud, Martin realized that he beheld the mountains.
Persistent failure to collaborate with his colleagues, and such inability to understand practical affairs as makes it dangerous to let him conduct the important laboratories and classes with which we have entrusted him.
Well, I’ll tell you, Doctor: if it’s a persistent case I usually give ammonium chlorid.
He noted but one thing which disturbed him: a milker had a persistent sore throat.
There are no more uses of "persistent" in the book.
Show samples from other sources
She has a persistent cough.
It is the kind of problem that can be solved if we are persistent in our efforts.