Where once, a few years earlier, her eyes alone could break the news (either to people or to bathmats) that two of her sons were dead, one by suicide (her favorite, her most intricately calibrated, her kindest son), and one killed in World War II (her only truly lighthearted son)—where once Bessie Glass’s eyes alone could report these facts, with an eloquence and a seeming passion for detail that neither her husband nor any of her adult surviving children could bear to look at, letů
There are no more uses of "calibrate" in the book.
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She calibrated the oscilloscope for better measurement.
He calibrated the thermometer for the Celsius scale.