bottomless
adj. 无底的;深不可测的;难解的;取之不尽的
例句
His eyes were like bottomless brown pools.
他的眼睛像两汪深不见底的褐色水潭。
《柯林斯英汉双解大词典》
The problem is we don't have a bottomless pit of resources.
问题是我们没有取之不尽的资源。
Geffen has a hunger for success that seems bottomless.
格芬对成功的渴望似乎永无止境。