但是，一些竞选者质疑早产儿成活率与孕期长短的相关性，他们认为造成早产儿的原因多是胎儿或孕妇本身患有疾病。

But campaigners question the relevance of data on premature babies, many of whom are premature precisely because they, or their mothers, are ill.

youdao

但是，一些竞选者质疑早产儿成活率与孕期长短的相关性，他们认为造成早产儿的原因多是胎儿或孕妇本身患有疾病。

But campaigners question the relevance of data on premature babies, many of whom are premature precisely because they, or their mothers, are ill.

youdao