Urbanization is an unavoidable phenomenon, and may cause a far-reaching influence and a dual effect (both advantages and disadvantages).
城市化进程不可回避且影响深远，同时还具有正、负双重效应。
It is of dual effect, having not only positive but also negative influences.
蓝色贸易壁垒具有双重效应，既有负面影响，也有正面影响。
Psychological frustration is a common phenomenon among college students, which has a dual effect.
挫折是大学生普遍发生的一种心理现象，其作用具有两重性。
Extensive and high efficiency, with the dual effect of pest control and sterilization, repairing effect of intestines, no vomiting, no affecting the flying physical ability of racing pigeons.
广谱高效，具有灭虫杀菌双重效果，对肠道有修复作用，不会产生呕吐现象，不影响赛鸽竞翔体能。
Extensive and high efficiency, with the dual effect of pest control and sterilization, repairing effect of intestines, no vomiting, no affecting the flying physical ability of racing pigeons.
广谱高效，具有灭虫杀菌双重效果，对肠道有修复作用，不会产生呕吐现象，不影响赛鸽竞翔体能。
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