钟摆左右摆动。

The pendulum swings ___from ___side ___to ___side.

老虎在笼子里来回踱步。

The tiger paced ___from ___side ___to ___side in its cage.

船在汹涌的海浪中左右摇晃。

The boat rocked ___from ___side ___to ___side in the rough waves.