I think I learned a lot from reading in general - even from reading badly written books.
“I've got time, I hope, to make lots of quiet records. So quiet you won't be able to hear them.”
“They also explained how the sensors can monitor the levels of acetone on people's breath, and this can be used to tell people who suffer from diabetes when their next insulin shot is due. This is a more discreet method than what is currently on the market.”