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- From 1979, a forex retention system was applied in China, although forex swap was gradually developing. 自1979年起，中国实施外汇留成制度，同时外汇市场逐步发展。
- The application of bentonite microparticulate retention system in paper mills was introduced in this paper. 介绍了膨润土微粒助留体系在造纸厂中的应用。
- The microparticle retention system could keep good retention, drainage and uniformity of paper. 微粒助留技术能够很好地改善纸页的留着、脱水和纸页匀度。
- The retention effects of deinking ch emicals on PEO /PFR retention system were tested with dynamic drainage ja r(DDJ )with 70mesh screen. 利用动态滤水仪探讨了脱墨化学药品对PEO/PFR系统的动态助留作用的影响。
- The microparticulate retention system has a short time of application in China and thus it makes the application experience short. 微粒助留体系在我国的应用时间短,这使得该系统的应用经验还比较欠缺。
- The microparticle retention system appeared in 1980s, and it could bring about good retention、 drainage and uniformity of paper. 20世纪80年代初期出现的微粒助留体系，能够很好地改善纸页的留着、脱水和纸页匀度。
- The retention system has also shifted from single polyacrylamide to microparticle reten-tion systems. 常用助留剂已从单一聚丙烯酰胺逐渐过渡到微粒和超微粒系统。
- These novel cationic microparticle retention systems were of advantage to the flocculation of the fine fibers,so that the systems could resist high shearing strength. 这些新型的微粒助留体系都有利于细小纤维形成理想的絮聚体,以抵抗浆料输送引起的高剪切力,从而提高了留着率和滤水效果。
- microparticulate retention system 微粒助留体系
- cationic microparticulate retention system 阳离子微粒助留体系
- The adsorbance of AKD emulsion particles on pulp is very little, while the absorbance become larger after adding PEO/bentonite retention system to it. It also shows that the retention of AKD emulsion particles are performed by PEO. 原浆对AKD粒子的吸附量很小，当加入PEO/膨润土助留体系后吸附量大大增加，再次说明新型AKD粒子的吸附是依靠PEO助留剂的；
- I suppose you also have a caste system in your society. 我想你们的社会里也有一种等级制度。
- The right to dissent is part of our political system. 有持异议的权利是我们政治体制的组成部分。
- Do you know how to log in to the system? 你知道怎么登录进入这个系统吗？
- Public opinion was against the old feudal system. 公众舆论反对旧的封建制度。
- The system works on the principle that heat rises. 该项装置是按照热力上升的原理运转的。
- The drainage system has been aged. 排水系统已经老化了。
- They called for a radical reform of our tax system. 他们要求对税收制度进行根本改革。
- PEO/CF two - component retention systems PEO／CF双组分助留体系
- This is a highly efficient new heating system. 这是个高效的新取暖系统。
