There are striking differences in life span between different species, but within one species the parameter is relatively constant.

不同物种之间的寿命存在显著差异，但在同一物种内，这一参数是相对稳定的。

youdao

I believe they were a subspecies of human but not a different species.

我相信他们是人类的一个亚种，而不是什么不同的物种。

youdao

The two animals are similar in appearance， but they belong to different species.

这两只动物外貌很相似，但它们属于不同的种类。

youdao

you talk about genetically modifying organisms and creating chimeras and managing to integrate different species: that's already happening, but you don't know what is possible and what's to come.

VOA: standard.2010.06.09

Most don't, but there are over 36 different species of mosquitoes in the Dallas-Forth Worth area.

NPR: Unusual Breed of Mosquitoes Hits Dallas

Of course they were visibly older, but they were almost a different species.

CENTERFORSECURITYPOLICY: Center For Security Policy

But most are an entirely different species: nervous, apprehensive, insightful, skilled and with a little bit of daring dying to get out.

FORBES: Are We On The Verge Of The Greatest Entrepreneurship Bubble Ever?