Question

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Brids in the city have to change their tune to be head above the noise,scientists from Holland found out。
A biologist from Holland got the surprising result by studying the great tit,ONe of the most common birds in Europe.He traveled around Europe by car and on bike recording great tits at 10 forest sites and centers of 10 large cities such as Paris and London.
"I stayed at camps and cheap hotels,'He said."I would be outside between 4 a.m and 5a.m to start recording."
The scientist and his workmate found songs of the birds in all 10 cities were shorter and faster-paced than those of the forest birds.City birds also had a higher pitch so that they could be heard above the noise.
While great tits can change their tune,that may be their luck,the biologist said.Many other tune,taht may be their luck,the biologist said.Many other species of birds will"have to move out."That's why there are many more birds in the countryside.

Answer 1

荷兰的科学家发现在城市的鸟必须改变了他们的音调来让自己的声音在噪音中可以被听到。一个来自荷兰的生物学家通过研究大山雀，一个欧洲最常见的鸟，有令人惊讶的结果。他驾汽车和自行车周游了欧洲，记录了10个森林和10大城市的中心，如巴黎和伦敦，的大山雀。“我呆在营地和便宜的旅馆，”他说。“我会在早上4点和5A之间开始记录。”科学家和他的同事发现在所有10个城市的鸟儿的声调比森林里的鸟的声调更短、节奏更快。城市鸟类还有更高的音调使他们可以在噪音中被听到。大山雀会改变他们的音调，这可能是他们的好运，生物学家说。许多其他的鸟不得不搬了出来城市（因为不能改变音调，所以自己的声音没法被别的同类听到）。这就是为什么在乡下（比城市）有多得多的鸟。

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