1.
Degradation of Biorefractory Organics by Electrocatalytic Oxidation;
电催化氧化降解难生化有机物的实验研究
2.
A Study on the Treatment of High Concentrated Bio-Refractory Chinese Traditional Medicine Wastewater;
高浓度难生化降解中药废水处理的研究
3.
Ru/AC Catalyzed Ozonation of Recalcitrant Organic Compounds
Ru/AC催化臭氧氧化难生物降解有机物
4.
The pampered children of the rich could not cope with the change.
娇生惯养的富家子弟难以应付变化。
5.
(chemistry, physics, biology) resistant to change.
（化学、物理学、生物学）难以改变的。
6.
On the Tough Legal Issue of the "Little Village Official" Policy and the Solution
大学生“村官”政策之法律难题及其化解
7.
The cultural dilemma of Chen Yun in Six Chapters of A Floating Life
试论《浮生六记》陈芸两难的文化处境
8.
Teacher-Student Conflict: Unavoidable Teaching Culture Collision
师生冲突:难以规避的教学文化碰撞
9.
Dressing: The professional dresser make you never forget the day.
化妆：专业的化妆师为您留下一生难忘的时刻。
10.
Landscaped Display of Miserable Life--Analysis of the Art and Culture of Peacock;
苦难生活的景观化表演——《孔雀》的艺术文化分析
11.
The Difficulty in Ecological Restoration of Rocky Desertification Zone and Its Cultural Countermeasures
石漠化带生态恢复的难点及文化对策研究
12.
Blazing the Trail is much more Difficult than without Trail Record of the creation of Shang Dynasty's Culture Annalistic Style System by Z ou Heng
无路难,开路更难──记邹衡先生商文化编年体系的创建
13.
Entertainment in Singapore seems less than impressive.
新加坡的文化生活似乎很难给人留下深刻印象。
14.
The company found it hard to survive in a changing marketplace.
这家公司难以在不断变化的市场中生存。
15.
The Cause of Learning Difficulties in Chemistry and Educational Involvement for Senior High School Students;
高中生化学学习困难的成因及教育干预
16.
The Present Situation of the Collage Students Funding System and Optimization Research;
我国高校家庭经济困难学生资助体系优化研究
17.
Status and Conversion Path Study on Junior Middle Schools Students with Learning Difficulties;
初中学习困难学生现状及其教育转化路径研究
18.
Research on the Causes and Conversion Strategies of Senior Students with Mathematics Learning Disabilities;
高一数学学习困难生的成因与转化策略研究