两座雕像分别矗立在广场入口的两侧。

Two statues were ___flanking the entrance to the square.

指挥官命令士兵从两侧包抄敌军阵地。

The commander ordered his soldiers to ___flank the enemy position from both sides.

两只狗蹲在小男孩的两侧，保护着他。

Two dogs were ___flanking the little boy, guarding him.