This makes the rain slightly acidic.

这使得雨水略带酸性。

They require well-draining soil with a slightly acidic pH.

种植茶树需要排水良好的土壤，且pH值略呈酸性。

This makes the rain slightly acidic, and when it falls, it causes rocks to erode.

这使得雨水偏酸性，雨滴落下，侵蚀岩石。

And pawpaws should be planted in well-draining, slightly acidic soil with a pH level between 5.5 and 5.7.

木瓜应种植在排水良好、pH值在5.5到5。7之间的微酸性土壤中。

Yeah that's true. I don't know why that is. Do you think that's because its slightly acidic maybe?

没错。我不知道原因。你认为那是因为葡萄略带酸性吗？

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

而自然雨水的酸碱度约为5.6； 与大气中的二氧化碳混合后呈弱酸性。

During heavy rains water, molecules in the rainwater react with the carbon dioxide in the atmosphere to form carbonic acid, which makes the rainwater slightly acidic.

在大雨期间，雨水中的分子与大气中的二氧化碳发生反应，形成碳酸，使雨水呈微酸性。

Chemicals and particulates in the atmosphere can be found in every drop, and some compounds— like carbon dioxide— make even regular rainfall slightly acidic.

大气中的化学物质和微粒可以在每一滴中找到，一些化合物——比如二氧化碳——甚至会使正常的降雨呈微酸性。

The water molecules and carbon dioxide molecules can then react to each other, to form carbonic acid, which lowers the pH of the water, making it slightly acidic.

之后，水分子与二氧化碳分子得以相互作用，形成碳酸。而碳酸会降低水中的 pH 值，让水变得更酸一点。

The bolus is broken down with the help of three major pairs of salivary glands that churn out an average of 1.5 liters of slightly acidic saliva every day.

在三对主要唾液腺的帮助下，食团被分解，唾液腺平均每天产生 1.5 升微酸性唾液。