1. Instancy and main policies for middle-water reusing in China were discussed. 陈述了我国中水回用的迫切性，指出其在我国的定位；
2. And this problem reveals its instancy and importance more and more, and needs to resolve the key theories and techniques relating to this problem. 因此，如何利用多源遥感数据以及相关信息实现准确可靠的地形与地面目标三维重建，这一问题越来越凸显出其迫切性和重要性。
3. The design and manufacturing of Fixture is a very important process in the cycle of manufacturing systems. It is instancy to improve the efficiency of Fixture design. 夹具的设计与制造在产品的生产周期中占有非常重要的地位，提高夹具的设计效率显的非常迫切。
英英解释
n.
1. the quickness of action or occurrence
2. urgently demanding attention
