So we should realize that the contemporary value of the traditional filial piety idea must see clearly the difficulty, and set up the theory, and carry on the conversion of the times on the methods.

要实现传统孝观念的当代价值就必须认清困难、建立理论，并在方式方法上进行时代的转换。

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Ezra Susser, an epidemiologist at Columbia, realised that a famine experienced by the Dutch at the end of the second world war had created an ideal set of subjects for a study of maternal malnutrition and filial psychopathology.

ECONOMIST: The fetus is father of the man