来自海豹死亡海域的海水样本确实含有异常高浓度的有毒细菌。

Seawater samples from the area where the seals died did contain unusually high concentrations of the toxic bacterium.

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饱和脂肪被人体用来制造胆固醇，而高浓度的胆固醇与心脏病直接相关。

Saturated fats are used by the body to make cholesterol, and high levels of cholesterol have since been directly related to heart disease.

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铱存在于陨石和火山物质中，但在火山物质中同时包含高浓度的镍和铬。

Iridium occurs in meteorites and volcanic material, but in the latter case it is accompanied by elevated levels of nickel and chromium.

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So if we consider lithium, potassium, and sodium, they're all together in the same group on the periodic table, knowing what we do about biology we can immediately think of sodium and potassium, or even just knowing what you know about table salt, for example, that these are two elements that we find, and particularly in the ion form in very high concentrations in our body.

我们来考虑一下锂，钾和钠，它们都在周期表中的同一族里，想要知道我们将元素周期律,用到生物学会怎么样，我们首先想到的就是钠和钾，甚至只需要知道食盐，我们发现它们是以很高浓度的离子形式,存在于我们体内的两种元素。

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