In the highway construction on soft foundation, "bump at bridge-head" is a difficult technical problem.
在软土地基修建高等级公路中，“桥头跳车问题”是一个技术难题。
In the highway construction on soft foundation, "bump at bridge-ends" is a difficult technical problem.
在软土地基修建高等级公路中，“桥头跳车问题”是一个技术难题。
Drawing interpretation and transformation are a difficult problem in international economic and technical exchange.
国际经济技术交流中，图纸翻译转化是一大难题。
Drawing interpretation and transformation are a difficult problem in international economic and technical exchange.
国际经济技术交流中，图纸翻译转化是一大难题。
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