adj.迟钝的，愚蠢的，态度勉强的

The angle in the triangle is obtuse, meaning it's greater than 90 degrees.
这个三角形的角度是钝角，即大于90度。
She solved the problem in an obtuse manner, not realizing its simplicity.
她以一种笨拙的方式解决了问题，没有意识到它的简单性。
The teacher explained the concept in a more acute way to avoid confusion with the obtuse definition.
老师用更直接的方法解释概念，以防混淆于那个模糊的定义。
His obtuse behavior during the meeting frustrated everyone present.
他在会议上的迟钝行为让在场的人都感到沮丧。
The obtuse shape of the room made it difficult to fit furniture without bumping into something.
房间的形状钝角，使得摆放家具时很难不碰到东西。
The child's inability to grasp the concept was due to an obtuse understanding of the subject matter.
孩子无法理解这个概念是因为对主题的理解过于肤浅。
The architect designed the building with acute angles to contrast with the neighboring obtuse structure.
建筑师设计这座建筑采用锐角，与周边的钝角建筑形成对比。
Her answer was so obtuse that it took me a moment to understand what she meant.
她的回答如此晦涩，我过了一会儿才明白她的意思。
The politician's obtuse response to the crisis revealed a lack of empathy and understanding.
政治家对危机的迟钝反应显示出缺乏同情心和理解力。
The professor's lecture was clear and concise, unlike the previous instructor's often obtuse explanations.
教授的讲座清晰明了，不像之前的讲师常常给出含糊不清的解释。