助跑；激增；急剧上涨；波浪爬高；上冲高度；飞行前试车；预热测试；投球手投球前的助跑。
the period of time just before an important event
投球手投球前的助跑。
The approach run of a bowler before delivering the ball.
在相对较短时间内的大幅增加
a substantial increase over a relatively short period of time
跳高运动员或其他运动员为获得速度或动量而进行的助跑。
The approach run of a high jumper or other athlete in order to gather speed or momentum.
运动员在加速时的助跑
the approach run during which an athlete gathers speed
重要事件前夕的一段时期；前奏期。
A period of time just before an important event.
价值或数量的增加；上升。
An increase in the value or amount of something.
海啸或风暴(如气旋)引起的波浪涌上陆地的范围。
The extent of a wave's reach onto land as the result of a tsunami or storm such as a cyclone.
飞机飞行前的预热和测试过程；试车。
The process of warming up and testing an airplane before a flight.
The run-up to the wedding was busier than she expected.
婚礼前的准备阶段比她预想的还要忙碌。
用法提示：run-up 在此句为名词，作主语，表示‘准备阶段、前夕’。
In the run-up to the music festival, tickets sold out quickly.
在音乐节到来前夕，门票很快就卖光了。
用法提示：run-up 为名词，在 in the run-up to 结构中表示‘在……前夕’。
During the run-up to the marathon, she increased her weekly mileage.
在马拉松比赛前的准备阶段，她增加了每周的跑步里程。
用法提示：run-up 为名词，在 during the run-up to 结构中表示‘在……的准备阶段’。
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Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.
