"perturbation"^^ . . . "107428450"^^ . . . . . . "105525964"@en-us . . . "0"^^ . "07428450-n"^^ . . "106973913"@en-us . . . . . . . "0"^^ . . "activity that is a malfunction, intrusion, or interruption; \"the term `distress' connotes some degree of perturbation and emotional upset\"; \"he looked around for the source of the disturbance\"; \"there was a disturbance of neural function\""@en-us . . . . . "disturbance"@en-us . . . "perturbation"@en-us . .