progression
[prəˈɡrɛʃən]
n.
（事件的）连续;
一系列;
发展，进展;
级数;
例句:
-
I think they saw it as a natural progression for me.
我想他们认为这对我来说是顺理成章的。
-
Both drugs slow the progression of HIV, but neither cures the disease.
这两种药物都可以延缓艾滋病病情发展，但是都不能治愈这种疾病。
-
I believe in progression, in taking risks, in never getting stale.
我崇尚进取、冒险和永不倦怠。
-
Each tune usually unwinds with a deeply-rooted logical progression.
来自BBC
-
Ever notice these representations always show a linear progression?
来自SA
-
Why wouldn't it be involved in tumor progression?
来自SA