Steganography technique is playing an irreplaceable role in the society and daily life.
密写技术研究的成果在社会及日常生活中发挥着不可替代的作用。
The auxiliary police system is very popular in the common law countries, playing an irreplaceable role in maintaining the local order.
辅警制度在英美法系国家蓬勃发展，在维护地方治安工作中发挥了无可替代的作用。
They are playing an irreplaceable role in the future of our country, so it is necessary that we should improve the quality of teachers.
由于学历是教师素质的重要指标之一，为了缩小同国际上小学教师的学历的差距，日益显示出小学在职教师学历提高的必要性。
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