The aorist expresses a punctiliar, or momentary, action, whereas the present tense expresses progressive action (to be doing) and the perfect tense is essentially an action that is completed (to have done).
यह शब्द स्वयं संकेत करता है कि वह जो अपनी सुगन्ध, या ख़ुशबू द्वारा पहचाना जाता है ।