1. 助跑：背跃式跳高 back layout | 助跑run-up | 起跳take off

2. 击低近球：Rules of golf 高尔夫规则 | Run up 击低近球 | Run 滚动

3. 跑上去,跑过去：just then 正在那时 | run up 跑上去,跑过去 | once adv. 一次;一度;从前

4. 向上跑：run up to 跑到 | run up 向上跑 | run upon 撞上

1. 前奏;预备期
The run-up to an event is the period of time just before it.

e.g. The issue of the monarchy is complicating politics in the run-up to the elections...
就在选举拉开序幕前，君主政体的问题使政局变得复杂起来。
e.g. The company believes the products will sell well in the run-up to Christmas.
公司相信在圣诞节前这些产品的销路会不错。

2. (投掷、跳高、跳远等之前的)助跑
In sport, a run-up is the run made by a player or athlete, for example before throwing a ball or a javelin, or before jumping.

e.g. When I began to compete again, I was struggling with my run-up.
当我重新参赛后，我要解决助跑这一项。

noun

1. the approach run during which an athlete gathers speed

2. a substantial increase over a relatively short period of time

e.g. a runup in interest rates
market runups are followed by corrections

Synonym: runup