鼴鼠丘,鼴鼠窩;蟻山
Molehill \Mole"hill`\, n. A little hillock of earth thrown up by moles working under ground; hence, a very small hill, or an insignificant obstacle or difficulty. Having leapt over such mountains, lie down before a molehill. --South.
molehill n : a mound of earth made by moles while burrowing