Certainly, the biological link between parent and child is fundamental.

当然了，父母和孩子之间的生理联系是基本的。

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Thus, the link between personality and alcohol consumption also has a biological basis, not only environmental and learning variables.

因此，性格和饮酒的联系不仅有环境和学习因素，还有了生物学基础。

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The Science: Much research has been done on the first link in the avatar chain, which is patching biological `wetware' into machined hardware.

现实中：在创造化身的最初阶段，进行了大量的研究，这项工作是将生物“湿件”(计算机专用术语﹐指软件﹑硬件以外的其它“件”﹐即人脑﹐也通常指人脑和机器连接起来的设备)与机械硬件融合。

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Not only does my ex-husband have no biological link to Irina - neither do I.

BBC: Switched at birth, then meeting aged 12

But because this is not a romantic or biological link, there is always a chance of this changing and I am well aware of it.

FORBES: What Is It Like To Be A Single Father?

Other biological processes also link seemingly unrelated diseases.

WSJ: Genes May Link Disparate Diseases