The two presidents met for the first time to discuss their longstanding border dispute.两国总统首度会晤，就长期以来的边界争端进行协商。Left ventricular failure is a marker for longstanding raised blood pressure.左心室衰竭是血压持续升高的标志。His family had a longstanding monastic tradition.他的家庭有长期简朴生活的传统。