经过无数作家的认真探索和反复实践，当代英国小说在艺术形式和创作技巧上与它早期的雏形已不可同日而语。
After countless writer's earnest exploration and repeated practice, contemporary English novels in artistic form and creative skills on early embryo of with it already is obvious.
经过20多年长期、反复的临床实践及深入研究，明确补肾为主的方药是治疗慢性乙型肝炎的有效方法。
Over the past 20 years, clinical practice and experimental researches have proved that kidney-nourishing therapy is an effective one for chronic hepatitis B.
人们对于一个复杂事物的认识往往要经过由感性认识到理性认识，再由理性认识到实践的多次反复才能完成。
For a complex of things that people tend to go through the perceptual knowledge to rational knowledge, and then from rational knowledge to practice repeatedly to complete.
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