Eventually, they evolved into giraffes.是什么意思？

Eventually, they evolved into giraffes.

最终, 它们进化成了长颈鹿.

eventually

adv. 终于，最后，竟，总归，终究；

例句
I did eventually find what I was after.
我最终找到了我想要的东西。

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

evolved

v. 演变，进化( evolve的过去式和过去分词 )，（动植物等 ）进化，进化形成；

例句
Dinosaurs evolved when most continents were joined in a single land mass.
恐龙进化的时候，多数大陆连为一体。

into

prep. （表示方向）进入…中，（表示所属）输入，（表示状态）进入…状态，（表示时间）持续到；

例句
By 1838, the abolitionists had shamed parliament into ending slavery in British colonies...
到1838年，废奴主义者迫使议会出于道德压力而废除了英国殖民地的奴隶制。

giraffes

n. 长颈鹿( giraffe的名词复数 )；

例句
Facing each other, the giraffes were managing to entwine their necks in the most astonishing manner...
长颈鹿正面对面地用力将脖子缠绕在一起，那种姿势令人大为惊诧。