progressions是什么意思？

progressions

• n. （事件的）连续( progression的名词复数 )，一系列，<数>级数，发展；

例句

• Progressions of gene therapy studies for hemophilia B were introduced in this paper. 就血友病B的基因治疗研究进展及所存在的问题作一综述.

柯林斯高阶英汉双解学习词典释义

• N-COUNT
  进展；发展；演变
  A progression is a gradual development from one state to another.
  例句
  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 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。
• N-COUNT
  （事件的）一连串，一系列，连续
  A progression of things is a number of things which come one after the other.
  例句
  ...a progression of habitats from dry meadows through marshes to open water. 从干燥的草地到沼泽地再到开阔的水面的一系列栖息地