translate English to French: where ∂h/∂mR = (1-(ac/c))-1 ∂h/∂at = -(vR - vt)(1-(ac/c))-1 ∂h/∂vt = -(ac-at)(1-(ac/c))-1 ∂h/∂vR = -(at)(1-(ac/c))-1 ∂h/∂Dt = (1-(ac/c))-1
Où ∂h/∂mR = (1-(ac/c))-1 ∂h/∂at = -(vR - vt)(1-(ac/c))-1 ∂h/∂vt = -(ac-at)(1-(ac/c))-1 ∂h/∂vR = -(at)(1-(ac/c))-1 ∂h/∂Dt = (1-(ac/c))-1