1·In addition, the scarcities and future developing perspectives in this field are also discussed.
此外，还指出了该研究领域的不足以及今后应该加强的研究方向。
2·This chapter sum up the whole paper's studies, simultaneously, pointed out the main contributions, characteristic, scarcities and improvement direction.
本章对本文所做研究进行了总结，指出本文的主要贡献、研究特色以及不足，并提出今后的改进方向。
1·There are clear signs that environmental scarcities could contribute to violent conflicts in many parts of the world.
各种迹象清晰的表明，环境资源的缺乏可能是引发许多地区冲突的原因之一。
2·China is a country short of water, especially water scarcities more serious.
我国是一个缺水的国家，特别是北方地区水资源缺乏现象更为严重。