dilatational viscosity

例句：

1. 1.The material's dilatational viscosity is a critical factor in its performance.
   材料的扩张粘性是其性能的关键因素。
2. 2.The engineer measured the dilatational viscosity of the fluid to determine its flow rate.
   工程师测量了流体的扩张粘性以确定其流速。
3. 3. The study found that the dilatational viscosity of the oil increased with temperature.
   研究发现，油的扩张粘性随着温度升高而增加。