(noun.) a humming noise; 'the hum of distant traffic'.
(verb.) sing with closed lips; 'She hummed a melody'.
(verb.) make a low continuous sound; 'The refrigerator is humming'.
(verb.) sound with a monotonous hum.
(verb.) be noisy with activity; 'This office is buzzing with activity'.
杰勒德整理
编辑:莉莉