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"In observational studies, we often have to rely on assumptions that are not directly testable."
The greatest reward is knowing that my music has made a difference in someone’s life.
历史不是一条直线;它螺旋上升,将我们困在其循环中,直到我们直面它的幽灵。
某些城市人工制品的永久性赋予了它们纪念碑的品质。