钟摆正在从左到右来回摆动。

The pendulum is swinging ___from ___side ___to ___side.

笼中的动物紧张地来回踱步。

The caged animal paced nervously ___from ___side ___to ___side.

暴风雨期间，船左右摇晃。

During the storm, the boat rocked ___from ___side ___to ___side.