Koznyshev only shrugged his shoulders to express his wonder at this sudden introduction of little birches into their discussion, though he had at once grasped his brother's meaning.
Sergio Ivanovich se encogió de hombros, expresando en este gesto su sorpresa porque salieran a relucir en su discusión aquellas ramas de abedul, aunque comprendió en seguida lo que su hermano quería dar a entender.