有些土壤的碱性，实际上对某些植物的生长是过高的。

Some soils are actually too alkaline for certain plant life.

《柯林斯英汉双解大词典》

抗酸剂是碱性的，它们通过中和胃容物中的酸来缓解疼痛。

Antacids are alkaline and they relieve pain by neutralizing acid in the contents of the stomach.

《柯林斯英汉双解大词典》

健康膳食的其中一个组成部分是每天至少喝2升纯净（最好为碱性的）矿泉水。

Part of a healthy diet is drinking at least 2 liters of pure (ideally alkaline) mineral water every day.

youdao

The native structure is this double stranded structure here and if I heat it up slightly and I add some base, so under slightly basic conditions, these molecules will fall apart because you've created conditions where the hydrogen bonding is no longer favorable so they peel apart.

原始结构,在这里就是指DNA双链,如果我稍微加热,并且加入一些碱,在弱碱性的条件下,这些配对碱基会分开,这是因为在一定条件下,碱基对之间的氢键,不再稳定并且会断裂分开

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