drift of convergence

例句：

1. 1. Theriver is drifting downstream.
   河流正顺流而下。
2. 2. The tide is drifting in.
   潮水正在涌来。
3. 3. Thecurrent of change is constantlydrifting through our lives.
   变化之流不断在我们生活中涌动。