無聲地,完全靜寂地,靜悄悄地
Soundless \Sound"less\, a. Having no sound; noiseless; silent. -- {Sound"less*ly}, adv. -- {Sound"less*ness}, n.
soundlessly adv : without a sound; "he stood up soundlessly and speechlessly and glided across the hallway and through a door" [syn: {noiselessly}]