新爸爸们此时要做出一些艰难调整，来迎接宝宝的最终到来。

Here, some particularly bumpy adjustments that new fathers must make when the baby finally comes home.

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研究人员给出的解释是冬天疾病泛滥，天气苦寒，污染浓度高，而此时的准妈妈和待产的宝宝们往往都非常脆弱。

Among the proposed explanations were diseases, harsh temperatures and higher pollution levels associated with winter when those expectant mothers and near-term foetuses might be most vulnerable.

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