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VERB
（迅速）侵占，占領
If an army or an armed force overruns a place, area, or country, it succeeds in occupying it very quickly.
例句
A group of rebels overran the port area and most of the northern suburbs...
一群叛亂分子迅速占領了港口地區和大部分城北郊區。
The centre of New Delhi was overrun by an armed mob which attacked government buildings.
新德里市中心被一群襲擊政府大樓的武裝暴徒控制了。
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ADJ-GRADED
橫行的；泛濫的；肆虐的
If you say that a place is overrun with things that you consider undesirable, you mean that there are a large number of them there.
例句
The flower beds were overrun with grasses...
花壇里雜草橫生。
The Hotel has been ordered to close because it is overrun by mice and rats...
由于老鼠泛濫成災，該旅館被勒令關閉。
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VERB
超過時限
If an event or meeting overruns by, for example, ten minutes, it continues for ten minutes longer than it was intended to.
例句
Tuesday's lunch overran by three-quarters of an hour...
星期二的午餐超時了45分鐘。
The talks overran their allotted time.
會談超過了他們的預定時間。
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VERB
（費用等）超支，超出預算
If costs overrun, they are higher than was planned or expected.
例句
We should stop the nonsense of taxpayers trying to finance new weapons whose costs always overrun hugely...
新武器研發的費用總是大大超支，卻還要試圖讓納稅人出錢資助，我們應該制止這一荒謬至極的行為。
Costs overran the budget by about 30%.
開支超出預算將近30%。