- 穴(row; gap)
- 工(craftsman; work)
An empty cave with nothing inside is just hollow space.
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aviation science
He is very interested in aeronautics.
aviation science
He is very interested in aeronautics.
An empty cave with nothing inside is just hollow space.
A child sitting under a roof with two hands diligently studying represents learning.
An empty cave with nothing inside is just hollow space.
A child sitting under a roof with two hands diligently studying represents learning.
aviation science
aviation science
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