VOA医学新闻精听示范 ¦ 研究成果发现减少食用盐可能患心脏疾病

小白老师说：今天为大家带来的是VOA一分钟新闻英语，只选择1~2分钟的精华内容，且医学相关，既能减轻大家的学习压力，又能高效把握新闻精华。同时，还附上了News background，帮助大家更好地理解新闻的来龙去脉；原文中蓝色字体部分小白老师给出了中文释义，快速扫清可能的生词障碍；最后还有语音难点详解。有了这些内容，相信大家没有老师，在家也可以高效练习听力。 好了，请先阅读New Background，然后点击下方条形框播放音频。

News Background

加拿大研究人员称，摄入适量食盐，比摄入过多与过少都更健康。该研究很可能助长关于饮食中盐健康效应的辩论。

多年来，医生警告称，大量摄入食盐会增加患高血压以及其他心脏疾病的风险，但是最近的研究结果对该论断提出了挑战。减少食盐摄入量可以降低血压已广为人知，但是并没有研究显示可以就此认为更大范围人群的总体心脏健康水平会更高。他们发表在《美国医学协会期刊》上的报告称，研究中发现低盐饮食的人死于心脏疾病的风险更高，因心率衰竭而入院的风险也有所上升。

News Transcript

A new study casts doubt on（对…产生怀疑） the merits（好处，优点） of reducing salt in our diet.

For years it’s been part of accepted medical wisdom: reducing salt in your diet will lower your blood pressure, which will lower your risk of heart attack and stroke（中风）.

But according to Danish research Niels gradual of Copenhagen University Hospital, the effect of a reduced-salt diet is less dramatic（显著的） than you might think.

“We found that in normal persons with normal blood pressure, the effects on the blood pressure were surprisingly small. In the patients with hypertension（高血压） the effect was somewhat bigger: the decrease was about 3.5 percent.”

Even a modest reduction for people with high blood pressure is probably a good thing, but the study also found that people on a low-sodium had higher levels of cholesterol（胆固醇）, which is associated with an increased risk of heart disease.

Graudal says the body’s natural salt-regulation system was also affected by a low-sodium diet. “And we saw that when you reduce the sodium intake, the hormone system（内分泌系统） was activated（激活）, which means that the body obviously felt that there was a danger that the amount of salt in the body could become too low.”

小白老师说：

Even a modest reduction for people with high blood pressure is probably a good thing, but the study also found that people on a low-sodium had higher levels of cholesterol, …

本句中blood尾音/d /和pressure的首音/p/同为爆破音，相遇时前者失去爆破，变成/blʌ’preʃə/。