Each specimen is carefully dissected.是什么意思？

Each specimen is carefully dissected.

每个标本都被细心解剖。

each

adj. 每，各自的；pron. 每个，各自；

例句
They were completely absorbed in each other...
两人彼此倾心。

specimen

n. 样品，范例，（化验的）抽样，某种类型的人；

例句
Good gracious, look at that specimen will you?
哎呀，你快来瞧瞧那个标本！

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

carefully

adv. 小心谨慎地，警惕地，仔细地，周密地；

例句
All through lunch he had carefully avoided the subject of the house.
整个午饭期间，他一直在小心翼翼地回避房子的话题。

dissected

adj. 切开的，分割的，（叶子）多裂的；v. 解剖（动物等）( dissect的过去式和过去分词 )，仔细分析或研究；

例句
We dissected a frog in biology class.
我们在生物课上解剖了一只青蛙。