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You can't see through a brick wall.
Literal
Brick [of-の] wall [topic-は] seeing-through [object-を] looking [cannot-できない].
透かして見る literally means 'to look (at something) through transparency' — i.e., to see through. The ~ことはできない structure negates capability in a slightly more formal way than the potential form alone. Note the topic framing: the brick wall is the topic of impossibility, not the grammatical subject of 見る.