在55岁之前，男性比女性更易患高血压，研究表明吃富含钾的食物能够减少患高血压和中风的危险。

Until the age of 55, more men suffer from high blood pressure than do women. Research suggests that foods rich in potassium can reduce the risk of high blood pressure and stroke.

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混合表面活性剂比单一表面活性剂更有利于提高钾溶出率。

The mixed surfactants had higher extractive degree of potassium than single surfactant.

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结果表明，在相对较低的载荷下，复合薄膜比硬脂酸钾薄膜具有更好的摩擦学性能。

It was found that the composite films on the hydroxyl-terminated silicon substrate showed better tribological properties as compared to potassium stearate films under relative lower load.

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So what we know is that these 3 d orbitals are higher in energy than 4 s orbitals, so I've written the energy of the orbital here for potassium and for calcium.

我们所知道的是,3d轨道能量,比4s轨道能量高，所以我写出了,钾和钙的轨道能量。

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