ballast

lastre

Material pesado que se coloca en un barco o globo para mantenerlo estable o equilibrarlo.

En inglés sencillo: Heavy material put in a ship or balloon to keep it steady or control its balance.

• The ship carries ballast for balance.
• They added sand as ballast to steady the boat.
• The balloon rose after the pilot released some ballast.

Sinónimos: stabilizing weight

Expresiones frecuentes: water ballast, carry ballast, release ballast

balasto

Piedras gruesas colocadas bajo vías de tren o carreteras, o utilizadas para hacer hormigón.

En inglés sencillo: Rough stones laid under railway tracks or roads, or used in concrete.

• Workers spread ballast under the tracks.
• The ballast helps rainwater drain away.
• Fresh ballast was laid along the repaired railway line.

Sinónimos: track gravel

Expresiones frecuentes: railway ballast, track ballast, lay ballast

lastrar

Poner material pesado en un barco u otro objeto para darle estabilidad.

En inglés sencillo: To put heavy material in a ship or other object to make it steady.

• They ballast the boat with sand.
• The crew ballasted the ship before departure.
• We need to ballast the vessel evenly.

Cómo se usa: ballast something with something (They ballasted the boat with bags of sand.)

Sinónimos: weight, stabilize

Expresiones frecuentes: ballast a ship, ballast with something, ballast a boat