内德博士定义真爱为：照顾他/她的健康、幸福快乐，让他们达到另一个水平高度，胜于自己的健康、幸福快乐。
Dr. Neder defines true love as caring about the health well-being and happiness of another person to a greater degree than your own health well-being and happiness.
在回答有关大流行警戒级别变更的问题时，陈博士解释说，世卫组织流感防备级别的定义是以h5n1禽流感为背景来制定的。
In response to a question on pandemic alert phase change, Dr Chan explained that the definition of WHO's influenza preparedness phases was developed against the backdrop of H5N1 avian flu.
博士课题通常是定义的非常窄的，但必须非常地深入。
PhD topic is usual quite narrowly defined, but you go very deep into it.
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