The research followed 1280 Australian mothers who gave birth in 1997.
研究人员对在1997年生产的1280名澳大利亚母亲进行了随访研究。
Birth outcomes were ascertained for 1280 (94%) of the 1369 women enrolled.
确定了所招募的1369名妇女中1280名(94%)的分娩结果。
The instruments used were further perfected in Bologna between 1270 and 1280.
1270年至1280年期间，那些在博洛尼亚使用的器械进一步完美化了。
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