a difficult problem

• This is a difficult problem . his method of attack is quite correct
  这是一个难题，他下手的方法相当正确。
• The issue of peasants is a hot point , and also a difficult problem
  农民问题既是热点问题，也是难点问题。
• This is a difficult problem
  这是一个很困难的问题。
• It ' s a difficult problem and i should like to go over the ground again
  这个问题是很麻烦，我想再了解一下情况。
• The test of shock wave is a difficult problem in dynamic measurement
  冲击波的测试是动态测试中难度较大的测试问题。
• Xml namespaces are an imperfect solution to a difficult problem
  对于困难的问题， xml名称空间是一种不完善的解决方案。
• Automatic counting of steel bars is a difficult problem in steel production
  摘要棒材自动计数是钢材生产中的一个难题。
• The classification of signals in sema ( simple em analysis ) is a difficult problem
  简单电磁分析攻击中的信号分类是一个难点问题。
• Here s how to view this as an antipattern : i ve started with a difficult problem
  下面是在反模式中考虑这个问题的方式：我从一个很难的问题开始。
• Its strong coupling and large inertia is all along a difficult problem in industrial controls
  其强耦合及大惯性一直是工业控制中难于解决的控制问题。