That alkalinity drops, however, as the concrete cures.

然而，随着混凝土固化，碱会下降。

The high alkalinity of uncured cement stops the moisture activating the spores.

未固化水泥的高碱阻止水分激活孢子。

Homeostasis refers to a system's ability to regulate its internal environment and maintain a constant condition of properties like temperature or pH.

内稳态是指一个系统调节自身内部系统的能力并维持其属性在一个常规的状态下就好像温碱。

And natural rain’s pH is about 5.6; it’s slightly acidic from mixing with carbon dioxide in the atmosphere.

而自然雨水的碱为5.6； 与大气中的二氧化碳混合后呈弱性。

The amount of carbon dioxide that is exhaled is important in regulating the acidity or alkalinity of the blood.

呼出的二氧化碳量对于调节血液的碱是重要的。

Acid rain can be surprisingly acidic: Some samples have been comparable to vinegar, or even stomach acid, with a pH of around 1.5.

雨的性出人意料：一些样品的碱为 1.5，甚至与醋甚至胃相当。

As he went, despite the stream of merry chatter about the relative merits of waterproof fabrics, or the perfect pH of beer, he was on the watch.

尽管他生前开过许多关于防水织物相对优点，啤酒最佳碱的玩笑，但他走后还是守望着这些大山。

At the same time, the secretion of gastrin is activated by other signals, like the rise in alkalinity caused by the stomach acid getting neutralized as it does its job.

与此同时，胃泌素的分泌被其他信号激活，比如胃在发挥作用时被中和引起的碱上升。

But it also helps regulate and maintain body temperature, pH levels, and the volume of fluids in your body. Plus it protects you from infection and from the loss of blood itself.

但它也有助于调节和维持体温、碱和体内液体的体积。此，它可以保护你免受感染和血液本身的流失。

Your internal balance between oxygen and carbon dioxide factors heavily into all sorts of stuff — especially in your blood, where it can affect your blood's pressure, its pH level, even its temperature.

你体内氧气和二氧化碳之间的平衡对各种物质都有很大影响——尤其是在你的血液中，它会影响你的血压，它的碱，甚至温。

Calcium, magnesium, and phosphorus harden bones and teeth, while iron is, of course, crucial in hemoglobin. Plus, potassium, sodium, and chlorine help maintain your body's pH balance and are used in action potentials.

钙、镁和磷使骨骼和牙齿变硬，而铁当然对血红蛋白至关重要。此，钾、钠和氯有助于维持身体的碱平衡，并用于动作电位。