牛津饥荒救济委员会的Graham Mackay指出，大部分的自然灾害发生四天后，援助机构就可以建立起救援物资分配体系，分配食物、水、临时住所。

In most natural disasters, points out Graham Mackay of Oxfam, by day four the aid agencies expect to have set up distribution systems for food, water and temporary shelter.

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细胞对外界信号可能会发生不同的反应，但这些反应都源自，配体和受体结合这个简单的化学过程。

There's a diverse range of responses that might occur, but that response is initiated by this simple chemical process of a ligand binding to a receptor.

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在此过程中，配体被认为是相对静止的结合伴侣，若蛋白的形状发生显著地改变，就不能与配体结合。

Ligands are considered to be the relatively static partner in the process, and easily rejected if the protein dramatically changes shape.

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There's a diverse range of responses that might occur, but that response is initiated by this simple chemical process of a ligand binding to a receptor.

细胞对外界信号可能会发生不同的反应,但这些反应都源自,配体和受体结合这个简单的化学过程

耶鲁公开课 - 生物医学工程探索课程节选

That infection occurs because of a ligand receptor interaction on the cell surface where the virus itself is the ligand and it takes advantage of a receptor that's expressed on the cell surface.

感染的发生是由于,配体与细胞表面受体相互作用,病毒是配体,它利用了在,细胞表面表达的受体

耶鲁公开课 - 生物医学工程探索课程节选