马匹在训练时受伤，兽医正在检查它的右侧。

The horse got injured during training, and the vet is checking its right ___flank.

指挥官派出一支部队保护我们的右翼。

The commander sent a unit to protect our right ___flank.

两座雕像矗立在广场两侧。

Two statues ___flanked the square on either side.