障碍问题 meaning in Chinese

problem on obstacle

Global integrability of gradients in obstacle problems
障碍问题中梯度的全局可积性
He is researching the reading problems of young school children
他正在研究年轻学生的阅读障碍问题。
Questions and the barrier questions
问题，以及障碍问题。
Very weak solutions for obstacle problems of weighted a - harmonic equation
一类加权椭圆方程障碍问题的很弱解
On the obstacles to the implication of language in intercultural communication
论跨文化沟通中的深层语言障碍问题

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