Setting up the ideal model is a common approach to the problems in physics.
构建理想化模型是处理物理问题常用的方法。
During his lifetime, Einstein thought about the universe and solved many problems in physics.
在他的一生中，爱因斯坦想了许多关于宇宙的问题，并解决了许多物理方面的问题。
During his lifetime, Einstein thought about the universe and solved many problems in physics.
在他的一生中，爱因斯坦想了许多关于宇宙的问题，并解决了许多物理方面的问题。
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