他雖然擺着一副若無其事的樣子,但是我想他心裏一定擔心得不得了。
He'll never show it, but I think that deep down, he's seriously worried.
Meaning
what one has learned (through experience, reading etc)
knowledge
insight
understanding
tips
CL:項|项[xiang4],個|个[ge4]
Examples
他雖然擺着一副若無其事的樣子,但是我想他心裏一定擔心得不得了。
He'll never show it, but I think that deep down, he's seriously worried.