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1.一项新的研究显示，想让心脏变得更健康，除了要减少饮食中钠的摄入之外，美国人还应该增加一种重要矿物质的摄入，这就是许多果蔬中都含有的钾元素。

A new study suggests that in addition to cutting the amount of sodium in their diets to improve heart health, Americans should also increase consumption of a key mineral found in many fruits and vegetables: potassium. 

2.钠是盐的重要成分，有迹象表明它会使血压升高，进而增加心脏病发作的风险，但至于高钠饮食是否真的会增加心脏相关疾病发作的风险，各种研究结果却是说法不一。

Sodium, a key component of salt, has been shown to raise blood pressure, which in turn raises the risk of heart disease, but studies have shown inconsistent results as to whether high-sodium diets actually boost the risk of heart-related problems.