单语范例（未经PONS编辑处理）
He obtained a patent for finding a way for a computer to verify that a user had correctly inserted blank checks in a dot matrix printer.
en.wikipedia.org Dot matrix printers are also more tolerant of the hot and dirty operating conditions found in many industrial settings.
en.wikipedia.org Older dot matrix printers used bitmap fonts; often stored in the memory of the printer and addressed by the computer's print driver.
en.wikipedia.org Line matrix printers were originally popularized by the mini-computer craze and continued its growth as a bar code printer.
en.wikipedia.org This mode is only used occasionally, partly because many dot matrix printers can not easily support it.
en.wikipedia.org