The children are stepbrothers and step sisters.

那些孩子是继兄弟和继姐妹。

And, of course, my stepbrothers stopped by for dinner on Thursday, and so did my aunts and uncles, with all their kids.

当然，我的继兄弟星期四来吃晚饭了。我的伯母伯父带着孩子也来了。

Research in humans has shown that girls growing up with stepfathers mature even more quickly than fatherless girls and that stepbrothers have a measurable effect too.

在对人类的研究中发现，和继父一起生活的女孩比起没有父亲的女孩更加早熟，在其中继父带来的儿子起着不可忽视的作用。