您要查找的是不是：
- It must be difficult to play various personae in the same movie. 在同一个电影中扮演不同的角色肯定不容易。
- Navigation is difficult on this river because of the hidden rocks. 因为河上有暗礁，所以在这条河上航行很困难。
- It was difficult to tell his exact age. 很难判断他到底多大岁数。
- A slow theme introduces the first movement. 第一乐章以缓慢的主旋律开始。
- It is difficult to express it in terms of science. 要用科学的字眼来表达它是很困难的。
- It was difficult to gauge how people would respond. 大家的反应如何难以估计。
- Do you have a bowel movement today? 你今天上过厕所吗？
- She handled a difficult argument skilfully. 她巧妙地应付了一场艰难的辩论。
- They are making a furtive movement. 他们正做一项诡秘的行动。
- He find it difficult to give shape to his idea. 他觉得很难把他的想法，明确表达出来。
- It's just a dog's reflex movement. 这正是狗的反射运动。
- It is difficult to decide between the two opinions. 在这两种意见之间抉择是困难的。
- It is difficult to keep on terms with such a man. 很难和这样的人保持友好关系。
- Sound and movement make information come alive. 声音和活动画面使信息变得活灵活现。
- It is difficult to stamp out all the crimes. 很难把所有的犯罪都消除掉。
- But nothing further came of this movement. 但这一运动后来就没有产生更多效果了。
- It's difficult raising a family on a small income. 依靠微薄的收入是很难养家的。
- Her every movement is very graceful. 她的一举一动都很优美。
- He is unable to do such a difficult job now. 他现在还不能做这样困难的工作。
- The movement continued to pick up steam. 这场运动继续在加速进行。
