Additionally, parathyroid hormone can boost 1-alpha-hydroxylase activity, which forms more active vitamin D, increasing gut absorption of calcium.

此外，甲状旁腺激素可以增加1-α-羟化酶活性，从而形成更多有活性维生素D，增加肠道对钙吸收。

Free radicals are highly reactive chemical entities that can damage cells.

自由基是能破坏细胞、有高反应活性化学实体。

Despite all the layers, the suit is flexible, allowing free movement so we can work.

尽管有所有这层，宇航服是有灵活性，允许自由运动，所以我们能够工作。

Both Ozempic for type 2 diabetes and the obesity treatment Wegovy have the same active ingredient, semaglutide.

治疗2型糖尿马鲁肽和治疗肥胖症威高维都有相同活性成分——塞马格鲁肽。

Now, all enzymes have an active site. That's the place in the enzyme where the reaction happens.

所有酵素有特定活性部位，也就是酵素反应发生地方。

Superacids get so strong because a lot of them are made by mixing an existing strong acid with another acid that involves the super-reactive element fluorine.

一种强酸和另一种含有有超强反应活性氟元素酸混合造就了大部分超强酸。

These surfactants have their hydrophilic head and their hydrophobic tails, and so they form these micelles around the dirt, which is what grabs onto dirt and oil, and helps it to remove it from the hair and the scalp.

这表面活性剂有亲水头部和疏水尾部，所以它们在污垢周围形成胶束，这胶束可以吸附污垢和油脂，并帮助它们从头发和头皮上清除。