dam

母羊和它的小羊羔在草地上吃草。

The ___dam and her lambs are grazing in the meadow.

工程师们计划在河流上筑坝以控制洪水。

Engineers plan to ___dam the river to control flooding.

水坝泄洪，水流湍急。

The ___dam is releasing water, and the current is rapid.