Each system produces about 25 kw which is enough to power about 10 homes.

一套系统的发电量是25千瓦这可满足十个家庭的能源需求。

So the formula for Kw becomes simply the hydronium ion concentration times the hydroxide concentration.

水分子既可以释放氢离子，也可以接收氢离子。

But we can also use the Kw and the hydronium ion concentration to do a very simple division problem and find the hydroxide concentration.

当氢离子浓度上升时pH值会降低举个例子，一种弱酸比方说醋酸，被加到水中时。

For instance, words like quit, question, quarter, etc, were pronounced with the familiar " kw" sound in Anglo-Norman (and, subsequently, English) rather than the " k" sound of Parisian French.

例如，quit、question、quarter 等词在盎格鲁-诺曼语（以及后来的英语）中发音为熟悉的“kw”音，而不是巴黎法语中的“k”音。