America 's young and old are differentiated not just by region but by race .
美国的年轻人和老年人的差别不仅呈现在区域分布上,而且还存在种族的差异。
In the past decade , scientists have figured out how to push differentiated cells back up the hill and , perhaps even more surprising , directly from one valley to the next .
As they begin to show differentiated business value over normal search , they will gain traction .
随着语义搜索开始创造出优于普通搜索的不同的商业价值,其吸引力将不断增加。
It can be differentiated from viral conjunctivitis by the purulent discharge ( shown ) .
其具有脓性分泌物的特征(如图所示),故可将其与病毒性结膜炎相鉴别。
He wants the school day lengthened to seven hours for elementary children , for teachers to work 38 weeks a year , and to be able to introduce differentiated pay .