adj.不能溶解的；不能解决的

There are some insolvable problems facing the music education in regular schools. 音乐课越来越陷入唯美的泥潭,成了面向少数学生、演给少数人看的“节目”。

Solvability is very important for anti-cancer drugs but taxol is almost insolvable in water (its maximum solubility is about 20mg/L). 水溶性对抗癌药物非常重要，但是紫杉醇在水中几乎不能溶解（它的最大溶解度大约是20mg/L）。

As an ethical concept, the metaphysical concept of "fidelity" tries to fetter translation onto the two poles of "faithful" and "unfaithful", thus incurring a number of insolvable problems. 摘要作为一个伦理概念，形而上学的“忠实”观念试图将翻译束缚在“忠”与“不忠”的两个极端，从而引起了一系列无法解决的问题。

15、These two factors combined to make the problem insolvable. 这两个因素结合在一起，使这个问题无法解决。

a seemingly insolvable problem. 好象难以解决的问题