Mother duck said quack quack quack. But only four little ducks came back.

鸭妈妈叫啊叫，但是只有四只小鸭子回来了。

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Once, biologists thought that ducklings followed the mother duck because of instincts.

曾经，生物学家认为小鸭子跟随母鸭是出于本能。

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Ducklings may follow a basketball or a briefcase if these are substituted for the mother duck at the time when imprinting occurs.

如果一个篮球或公文包在印记发生的时候代替母鸭，小鸭子可能会跟随它们。

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Hong Kong resident Jessie Wong, posing for photos with her 78-year-old mother, said the duck's popularity made sense, given the lack of other entertainment options in the city.

WSJ: In Hong Kong, Giant Duck Makes a Splash