We also talked about what systolic and diastolic blood pressure are, and how they're measured.

我们还讨论了什么是收缩压和舒张压，以及如何测量它们。

The second reading is your diastolic blood pressure, which is the pressure in your arteries when the ventricles are relaxed.

第二个读数是你的舒张压，这是心室放松时动脉中的压力。

These guys are really stretchy, kind of like Spandex and this is what allows these arteries to keep their shape, as well as absorb and even-out the systolic and diastolic pressures.

它们很有弹性，有点像Spandex弹力衣；这使动脉得以保持形状，以及承受、平衡收缩压和舒张压。