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- Researches indicated that solid water can enhance the survival rate of trees, especially in difficult site, satisfactory effects of afforestation could be obtained. 摘要以往研究表明，固体水能够提高造林成活率，特别在困难立地造林应用中已取得较好效果。
- 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。
- Numerical Analysis Simulation and Flight Check on the Difficult Site for ILS ILS系统复杂场地的数值计算仿真与飞行检验
- 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。
- The monument was moved bodily to a new site. 纪念碑整个迁到一个新场址。
- It was difficult to gauge how people would respond. 大家的反应如何难以估计。
- She handled a difficult argument skilfully. 她巧妙地应付了一场艰难的辩论。
- Is it safe to site the power station here? 在这建造发电厂安全吗？
- 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。
- The group goes on a lecture tour of site in greece. 该旅游团前往希腊著名景点进行修学旅游。
- 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。
- It is difficult to stamp out all the crimes. 很难把所有的犯罪都消除掉。
- It's difficult raising a family on a small income. 依靠微薄的收入是很难养家的。
- Excavation of the site will begin tomorrow. 明天开始挖掘工作。
- He is unable to do such a difficult job now. 他现在还不能做这样困难的工作。
- A dump truck was parked on the construction site. 建筑工地上停著一辆倾卸车。
- She can play the most difficult piano music by ear. 她能不看乐谱，光凭听觉记忆弹奏最难的钢琴曲。
