Definition
To be unable to comprehend or understand something.
無法理解
I just can't get my head around why he made such a decision.
我就是無法理解他為什麼會做出這樣的決定。
I can't get my head around this complex theory at all.
我完全無法理解這個複雜的理論。
She can't get her head around the concept of calculus in math.
她無法理解數學中的微積分概念。