工人们正在使用大型机器疏浚河道。

Workers are using a big machine to ___dredge the riverbed.

那场同学聚会勾起了我们对学生时代的回忆。

The class reunion ___brought up memories of our school days.

在炸鸡块之前，先轻轻裹一层面粉。

Lightly ___dredge the chicken pieces in flour before frying them.