Measurements of their bones at the site in Hambleden show all the babies died at around 40 weeks gestation, suggesting very soon after birth.
根据汗布尔登遗址骨头的测量发现，所有这些婴儿均死于40周妊娠期前后，也就是出生后不久。
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Research has shown female pandas who are pregnant with twins deliver the second cub anytime between 12 minutes and 12 hours after giving birth to the first, according to the zoo's Web site.