城市是一个活的有机体，不断演变。
No president who performs his duties faithfully and conscientiously can have any leisure.
全球竞争力的关键在于本地适应性。
I believe in taking care of myself, in a balanced diet, in a rigorous exercise routine.
Psychology must be grounded in the facts of living experience.
The ethical implications of gene editing must be considered at every step.