He'd also seek out patients undergoing bloodletting in order to take all their life juice for himself.

他还会寻找正接受放血治疗的，便把他们的血液都拿来自己喝掉。

It is not clear that such bloodletting is required.

目前尚不清楚是否需要这样的放血。

They also memorized poems to commit information to memory— such as one identifying where on the body bloodletting should be performed.

他们还通过背诵诗歌来记忆信息，比如首确定应该身体的哪个部位进行放血的诗歌。

So, maybe all those bloodletting patients from the past didn't understand what improvements in biomarkers meant, but found that they felt a little better.

所，也许过去所有放血的都不明白生物标记的改善意味着什么，但他们发现自己感觉好。

For 3,000 years, people have been cut or given leeches to let out the blood because they thought that would make people better.

长达3000年的时间里，们划破皮肤放血或使用水蛭吸血，因为他们认为放血能够改善他们的身体。

And I happen to see this really tiny study which had the unpromising name, sub-lethal behavior and physiological effects of the biomedical bleeding process on the American horseshoe crab, Limulus Polyphemus.

我碰巧看到这项非常微小的研究，它的名称、亚致死行为及对美洲鲎（Limulus Polyphemus）生物医学放血过程的生理影响都没有什么希望。