请输入您要查询的英文单词：
单词
ˈrun-ˌup
释义
ˈrun-ˌup
NOUN
a run that someone makes before jumping, throwing a ball etc （跳高、投球等前的）助跑
PHRASE
-
the run-up to sth
the period of time just before an important event
（重要事件的）序幕，前奏，预备期