by instinct

凭(靠)本能

buzzard, buzzer, by, by accident, by air, by all means, by all nerves, by analogy, by and by, by and large, by any means, by chance, by choice, by comparison, by courtesy of, by error, by far, by force, by hand, by heart, by invitation, by itself, by leaps and bounds, by little and little, by means of, by mistake, by name, by nature, by night, by no means, by oneself, by pressed for, by reason of, by reason that, by request, by the moment, by the name of, by the same token, by the standards of, by the way,