adj.不可靠的；靠不住的；不可信賴的

As for ordinary pleasure, it's undependable. 而平常的快意，是不可靠的。

Would you like to have an undependable person as one of your best friends? 你愿意和一個(gè)不可靠的人做好朋友嗎？

He says projects designed to increase interpersonal trust can have a major effect in poor countries with undependable legal systems. 他說在一些法律體系靠不住的欠發(fā)達(dá)的國家里，一些旨在促進(jìn)人們之間相互信任的方案會(huì)起到主要的效果。