It's in the poorer, underdeveloped eastern region of the country that the biggest problems exist.最大的问题存在于这个国家较为贫穷落后的东部地区。There have been deep divisions in the party over Europe.该党内对欧盟问题存在严重分歧。It had never crossed his mind that there might be a problem.他从未想过可能会有问题存在。