A transitional period is one in which things are changing from one state to another.
例句
...a transitional period following more than a decade of civil war...十多年的内战结束之后的过渡时期We are still in the transitional stage between the old and new methods.我们仍然处于新旧方法的过渡阶段。
ADJ
过渡性的;过渡时期的
Transitional is used to describe something that happens or exists during a transitional period.
例句
The main rebel groups have agreed to join in a meeting to set up a transitional government.主要叛乱集团已同意参加会议讨论建立一个过渡政府。
英英词典释义
Adjective
1. of or relating to or characterized by transition;
"adolescence is a transitional stage between childhood and adulthood"