这些复杂的哲学概念很难理解。

These complex philosophical concepts are hard to ___grasp.

有些人永远无法掌握个人理财的基本原则。

Some people never ___grasp the basic principles of personal finance.

学生们迅速领会了这两种理论之间的联系。

The students quickly ___grasp the connection between the two theories.