Hotel owners have been forced to find new ways of attracting tourists since the sudden drop in tourism last year.

自从去年旅游业急剧下滑以来，饭店的老板被迫去寻找新的吸引游客的方法。

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"Why the sudden drop in Numbers?" asks Wilcove.

“为什么红腹滨鹬的数量突然减少？”威尔考乌问。

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Reducing the gas pressure also brings about a sudden drop in temperature, typically from 10c to -30c.

减低气压也会带来温度的骤降，通常是从10度降至零下30度。

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Many people blamed the Greek crisis for the sudden drop in American stock markets last Thursday.

VOA: special.2010.05.14

In fact, they say, the sudden drop in temperature can be dangerous for people with underlying health issues.

CNN: Are polar bear plunges good for you?

Spurred by a sudden drop in prices, Asians in the last two weeks have gone on a gold-buying binge.

FORBES: China Goes Gold Crazy. Why Now?

In other words, producers were caught out by a sudden drop in sales.

ECONOMIST: Down under