And while we know plenty about the consequences of ageing, we know much less about the exact biological processes involved.
尽管我们很清楚衰老的结果，但是对衰老的生物过程我们所知甚少。
Recent concern has stimulated enormous research, and we know much more about influenza viruses and pandemics than we did four years ago.
最近的担忧激发了大量研究，我们现在比四年前更加了解流感病毒和大流行问题。
We know much about how anesthetics work, for example, based on clinical trials with rats.
比如说，根据在老鼠身上进行的临床实验，我们对麻醉剂如何起作用已经有了很深入的了解。
We know much about how anesthetics work, for example, based on clinical trials with rats.
比如说，根据在老鼠身上进行的临床实验，我们对麻醉剂如何起作用已经有了很深入的了解。
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