Hung Yi-chang, assistant director of the aboriginal health center at the Tzu Chi College of Medicine, says that when Ami are asked how many fish they have caught, they rarely respond with the exact figure and instead just say "dulu." This literally means three, but when they reply that way it doesn't necessarily mean that they've caught exactly that number, but rather that they've "caught some."
慈濟醫學院副教授鴻義章也指出，阿美族在回答人家釣多少魚時，不大說釣了幾條魚等描述，通常用「三個」（DULU）來表示，這不一定表示他釣到了三條，只是表示「已經有了」。