他在学数学方面有困难 He has difficulty learning mathematics ; He had difficulties in mathematics
在某方面有困难 Difficulties in some aspects
在什么方面有些困难 Some difficulties in what
我在数学方面有些困难 I some difficulties in mathematics
我们在招聘雇员方面有困难。
到目前为止，机器在模仿创造力方面有相当困难的时间，它们的随机性足以让计算机无法预测，但也不仅仅是简单的随机性。
So far, machines have a pretty hard time emulating creativity, arbitrary enough not to be predicted by a computer, and yet more than simple randomness.
波士顿布里格姆妇女医院的科克·戴夫纳医生说：“50岁以后，人们在快速记住人名、地点和物品方面有困难是很普遍的。”
After age 50, it's quite common to have trouble remembering the names of people, places and things quickly, says Dr. Kirk Daffner of Brigham and Women's Hospital in Boston.
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