英音听力讲解:专家称加工食品成肥胖的罪魁祸首

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短语讲解：

1. The rallies are part of a fightback by the president whose popularity has fallen because of the country's economic crisis and a long-running corruption scandal.

because of 因为，由于
例句：The journey was slow because of continual stops.
由于常常停下来，所以行程很慢。

2. At least 24 people are now known to have been killed. Justin Roller reports. This morning, specialist rescue workers pull out another body from the rubble of shattered concrete and the tangle of steel.

at least 至少
例句：In fact it requires at least n generators.
事实上，它至少要有n个元素。

3. Bowie died in the city in January at the age of 69.

at the age of 在…岁时
例句：Children enter primary school at the age of 7.
孩子们7岁进小学。

4. Around a quarter of its players suffer hearing illnesses.

a quarter of 四分之一的
例句：I would like a quarter of a pound(1/4 1b)of tea please.
我要买四分之一磅（四英两）的茶叶。