绝对游离的甲状腺素的英文：
absolute free thyroxin(e)

absolute是什么意思：
adj. 绝对的；完全的；专制的
n. 绝对；绝对事物

This is absolutely a scratch.
这完全就是一通乱写。

The performances have been absolutely phenomenal.
表演绝对精彩。

It's absolutely no business of hers.
这件事与她毫不相关。

free是什么意思：
adj. 自由的；免费的；空闲的；任意的；免税的；游离的
adv. 免费地；自由地
v. 释放；免除；使自由，解放

Freedom is not free.
自由不是无偿的。

Be covered by free Medicare / be entitled to free medical care
享受公费医疗

It depends on free oxygen or air.
它依靠大量的氧或者空气。

thyroxin是什么意思：
n. 甲状腺素

Treatment of disease with animal endocrine organs or extracts such as insulin and thyroxin.
器官疗法或内脏制剂疗法服用动物内脏或其提取物如胰岛素与甲状腺素的治疗疾病的方法

"Physicians treat goitre, a disease of the thyroid gland, with thyroxine, from the thyroid glands of cattle and hogs."
医生用从牛和猪甲状腺制取的甲状腺素治疗甲状腺疾病甲状腺肿大。

A thyroid hormone,C15H12I3NO4,similar to thyroxine but more potent,used in the treatment of hypothyroidism.
三碘甲腺氨酸一种甲状腺激素，C15H12I3NO4，类似于甲状腺素，但生理作用较之为快且强，用于治疗甲状腺机能减退