isochronous stratigraphic unit

例句：

1. 1.The isochronous growth of the plant is crucial for its survival.
   植物的生长是同步的，对它的存活至关重要。
2. 2. The scientists observed the isochronous behavior of the animals during the experiment.
   科学家们观察了动物在实验中的同步行为。
3. 3. The isochronous pulses in the heart are responsible for the rhythmic beating of the heart.
   心脏中同步的脉冲负责心脏的节律跳动。