The tail wags the dog.

例句：

1. 1. The dog wags its tail as it greets you.
   狗摇着尾巴迎接你。
2. 2. The sails of the boat sway gently in the breeze.
   船帆在微风中轻轻摇曳。
3. 3. The tree sways slightly in the wind.
   树在风中微微摇晃。