“无底的”的英语？

金矿并非无底的宝藏，金子终究会被采光。A gold mine is not a bottomless pit, the gold runs out.他们的客户一般都想从无底的亏损中解放出来.Their customers are usually desperate to dig out from abysmal losses.无底的寒泉使他僵直.The bottomless cold paralyzes him....