由于所有的加工厂都在城市地区，取消关税将严重阻碍政府在未来五年内降低城市失业率的努力。
Since all the processing plants are in urban areas, removing the tariff would seriously hamper the government's effort to reduce urban unemployment over the next five years.
对孤立儿童的个案研究表明，他们缺乏坚定的自我概念，而其语言能力的缺乏严重阻碍了他们的智力和心理发展。
Case studies of children who are isolated from others reveal that they lack a firm self-concept, and their mental and psychological development is severely hindered by lack of language.
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