Oblonsky gave a scarcely perceptible smile on noticing the quick change, so familiar to him, in Levin's face, which became as gloomy as it had been bright a moment before.
Stepan Arkad’ic sorrise appena percettibilmente, cogliendo il mutamento subitaneo, e a lui così noto, del viso di Levin, divenuto tanto scuro quanto allegro era stato un momento prima.