| 例句 |
It has been very difficult to maintain the alignment between the two countries since the trade dispute.贸易争端后已很难维持两国之间的同盟关系了。When she was unemployed it was very difficult to provide for her children.她失业期间，很难维持孩子的生计。The teacher has a hard time maintaining discipline in the classroom.教师很难维持课堂纪律。Some teachers find it difficult to keep their classes in order.有些老师觉得很难维持课堂秩序。She found it difficult to sustain the children's interest.她发现很难维持孩子们的兴趣。 |