钟摆以稳定的节奏左右摆动。

The pendulum swings ___from side to side with a steady rhythm.

老虎在围栏里焦虑地来回踱步。

The tiger paced ___from side to side in its enclosure.

船只在汹涌的海面上左右摇晃。

The ship rocked ___from side to side in the rough sea.