This is the 11844th most frequent Spanish word.
hidráulicas
Hydraulic: Related to the movement or use of liquids, especially water, in engineering or machinery.
In this sentence, 'hidráulicas' is used as an adjective to describe machines that operate based on hydraulics, a technology utilizing fluid pressure.
Las máquinas hidráulicas funcionan gracias a la presión de líquidos.
Hydraulic machines operate thanks to liquid pressure.
Here, 'hidráulicas' modifies 'presas,' indicating that the dams employ hydraulic systems to produce energy.
Las presas hidráulicas generan electricidad mediante el agua.
Hydraulic dams generate electricity using water.
In this example, 'hidráulicas' is used as an attribute of 'sistemas,' referring to systems involving hydraulics or fluid mechanics.