Bilirubin and biliverdin are both cholochromes.是什么意思？

Bilirubin and biliverdin are both cholochromes.

胆绿素、胆红素都是胆色素.

bilirubin

n. 胆红素；

例句
HPLC method was established for determination of bilirubin in compound paracetamol and amantadine hydrochloride tablets.
建立了HPLC法测定复方氨酚烷胺片中胆红素.

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

biliverdin

n. 胆绿素；

例句
Bilirubin and biliverdin are both cholochromes.
胆绿素、胆红素都是胆色素.

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

both

adj. 二者，两者都；pron. 二者；adv. 二者，二者都；conj. 不仅…而且…，…和…都；

例句
The gym can be used by both able-bodied and disabled people.
这家健身房健全和残障人士都可使用。