descending node

例句：

1. 1. The graph shows thedecreasing trend of the population over time.
   图表显示了人口随时间递减的趋势。
2. 2. Themountain is a natural landmark with a descending node at its peak.
   这座山是一个自然地标，其顶峰有一个下降的节点。
3. 3. The computer network has many nodesthat communicate with each other through the internet.
   计算机网络有许多节点，它们通过互联网相互通信。