Unless you are allergic to tarantula venom, they are harmless to humans (though they pack a painful bite).

除非你对狼蛛毒素过敏，否则它们对人体是无害的（尽管它们咬你一口会很痛）。

youdao

youdao

Moreover, even though humans have been upright for millions of years, our feet and back continue to struggle with bipedal posture and cannot easily withstand repeated strain imposed by oversize limbs.

此外，尽管人类直立行走已经有数百万年的历史，我们的脚和背部仍在两足行走的姿势中艰难斗争，无法轻易承受过长的四肢持续施加的压力。

youdao

Only humans, though, develop the physical capability to make the complex sounds of speech.

ECONOMIST: Language

Receptors work the same way in humans, though we have fewer of them--350 compared with 1, 000 in mice.

FORBES: Magazine Article

Though humans are limited to 300 million pattern recognizers, only the neocortex can do hierarchical thinking and only mammals have a neocortex.

FORBES: Kurzweil at Techonomy: Artificial Intelligence Is Empowering All of Humanity