Then they often follow that with a sprinkling of dust to create a protective layer of dirt on their skin (think elephant sunscreen!)

然后会再洒上少量尘土，在皮肤上形成一个尘土的保护层(大象也防晒吧！)

youdao

It fires balls that burst and release a chili solution when they hit the elephant's skin.

VOA: special.2010.07.27

Such skin absorption occurs in other mammals, and the leathery look of elephant skin is deceptive it actually has a rich blood supply.

ECONOMIST: Elementary elephant control

Unlike apes which spend much of their time picking dirt and lice off their skin and fur, elephant preening is more about rolling in mud than removing it.

ECONOMIST: Self-recognition