The early Australians may have painted on the walls of rock shelters and cliff faces at least 30,000 years ago, and maybe as much as 60,000 years ago.
早期澳大利亚人可能在至少3万年前,也可能在长达6万年以前,就在岩洞和悬崖的壁上作画了。
2
They lack water-storing structures, and their existence on rockfaces prevents them from tapping groundwater, so they have instead developed the ability to change their metabolism.