insurmountable

adj.

不可逾越的；不能克服的；

1. The problems are not insurmountable.
   问题不是无法解决的。
2. The age barrier appeared insurmountable.
   年龄障碍看来是无法逾越的。
3. No difficulty is insurmountable if one sets one's mind on it.
   精诚所至，金石为开。
4. We know there are difficulties, but none of them are insurmountable.
   我们知道有困难，但这些困难都不是不可以克服的。

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Naeem, S., and J. P. Wright. Disentangling biodiversity effects on ecosystem functioning: deriving solutions to a seemingly insurmou...
Differentiation between binding sites for angiotensin II and nonpeptide antagonists on the angiotensin II type 1 receptors