A Note on Gluon Condensate with Translational Invariance

A non-local two-gluon vacuum expectation value is expanded as a power series of space-time interval x - y and possesses the translational invariance in Lorentz gauge. The coefficients of the first two terms in the power series are related to <0|B²|0> in Lorentz gauge. The value -(127MeV)² of <0|B²|0> is estimated with the phenomenological values for the vacuum condensate <0|G²|0> and <0|ψψ|0> through the quantum chromodynamics equation of motion.