White rhinos are classed as 'near threatened' in the wild, with a population of only 17,500. Lots of zoos and safari parks across Europe are exchanging their rhinos in order to maximise the breeding potential of the captive European population.
I made it pretty clear that he had outstayed his welcome but he is so thick-skinned he didn't take the hint.
Just be a little gentle with her as she is very sensitive and not thick-skinned at all!
另一个英语 beauty is only skin deep means 一个人的内心比外表更重要。
She may not be a beauty queen but you know what they say, beauty is only skin deep.