convergent area of main and branch

例句：

1. 1.The researchers found that the convergent area of the two rivers was where the most significant changes in the environment occurred.
   研究人员发现，两条河流的汇合区域是环境发生最显著变化的地方。
2. 2.The city's transportation network is designed to minimize the convergent area between different modes of transport.
   城市的交通网络设计旨在最小化不同交通工具之间的汇合区域。
3. 3. The scientists were studying the behavior of migratory birds and their interactions with the environment at the convergent area of two major ocean currents.
   科学家们正在研究迁徙鸟类的行为以及它们与两大海洋洋流交汇区域的相互作用。