这条堤坝保护了村庄免受海水的侵袭。
The ___dike protects the village from sea flooding.
村民们建造了堤坝来防止河水泛滥。
The villagers built ___dikes to prevent the river from flooding.
农民们修建了一条堤坝来灌溉田地。
The farmers built a ___dike to irrigate their fields.