a mythical creature that could change its form是什么意思？

a mythical creature that could change its form

能改变形体的神话中的生物

mythical

adj. 神话的，虚构的；

例句
...the Hydra, the mythical beast that had seven or more heads.
许德拉，神话里有7个或更多脑袋的怪兽

creature

n. 生物，动物，人，创造物，（他人的）工具；

例句
Alaskan Eskimos believe that every living creature possesses a spirit...
阿拉斯加的爱斯基摩人认为每一个活着的生物都有灵魂。

that

det. 那个，那；pron. 那个，那；conj. 多么，如此…以至，用于某些动词、形容词和名词后，引出各种从句；adv. 不那么，那样；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

could

aux. “can”的过去式，能够，打算，用于假设语气的条件句，用于虚拟语气的结论句；

例句
The regulations were relaxed and the prisoners could get out and about a bit.
规定有所放宽，犯人可以出去短暂放风。

change

vt. 改变，变更，交换，替换，兑换，换衣服（床单）；vi. 改变，转变，交换，互换，换衣，更衣；n. 变化，改变，交换，交替，零钱，找头，代替物；

例句
There'll still be a feeling abroad that this change has to be recognised.
人们还会普遍觉得这项变革早晚得接受。

its

pron. (it的所有格形式)它的，厥；

例句
The government is to accelerate its privatisation programme.
政府将加快其私有化计划的进程。

form

n. 形状，形式，外形，方式，表

例句
A household radiator absorbs energy in the form of electric current and releases it in the form of heat.
家用取暖器吸收电流能量，再以热量的形式释放出来。