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.