vested interest
An interest the right to the enjoyment of which, either present or future, is not subject to the happening of a condition precedent.
vested interest
既得利益
既得利益 英语：vested interest 法语：droit acquis 德语：sicher erworbenes Anrecht 意大利语：diritto acquisito (di godimento futuro) 西班牙语：derecho adquirido