zhè zuò / àn bà / yǐn cáng / zài / hé miàn / zhī xià / yòng lái / tái gāo / shàng yóu / shuǐ wèi

这座暗坝隐藏在河面之下，用来抬高上游水位。

This submerged dam is hidden under the river surface to raise the upstream water level.