求翻译：20世纪中叶以后，随着普通话的推广和与省内外、国内外交流的日趋广泛和频繁，太原市城市居民的成分早已打破了地域的局限。而城市居民所使用的语言，也逐渐地弱化了方言特点而日益与普通话趋同。这方面表现最明显的一点是“入声”字的变化：现今年龄在50岁以下的人，语言中入声字已经没有了“阴入”与“阳入”的区别而统统发声为“阴入”。是什么意思？

After the mid-20th century, and with the promotion of Mandarin and outside the province, the increasingly wide range of domestic and international exchanges and frequent, the composition of Taiyuan city residents already breaking down geographical limitations. The language used by urban residents, b

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After 20th century middles, along with standard spoken Chinese promotion and with province inside and outside, the domestic and foreign exchanges is day by day widespread and is frequent, the Taiyuan city people's ingredient has already broken the region limitation.But the city peoples use language,

After the middle of the 20th century, with the popularization of Putonghua and inside and outside the province, increasing domestic and international exchanges and frequent, composition of urban residents in Taiyuan has been breaking down geographical limitations. The language and the town residents

After the middle of the 20th century, with the popularization of Putonghua and inside and outside the province, increasing domestic and international exchanges and frequent, composition of urban residents in Taiyuan has been breaking down geographical limitations. The language and the town residents