progression
noun [ C or U ] uk/prəˈɡreʃ.ən/ us/prəˈɡreʃ.ən/
C1 进展；发展；前进
the act of changing to the next stage of development
Drugs can slow down the progression of the disease. 药物能减缓疾病的恶化。
The novel follows the progression of a woman from youth to middle age. 这部小说以一个女人从青年到中年的经历为主线。
She'd always worked with old people so becoming a nurse was a logical/natural progression. 她一直和老年人在一起工作，因此成为一名护士是自然而然的事。