to be lost in thought or imagination
in Gedanken oder Fantasie verloren sein (in Gedanken oder Fantasie verloren sein)
"He didn’t hear me because he was in a world of his own."
"Er hat mich nicht gehört, weil er in seiner eigenen Welt war." (Er hat mich nicht gehört, weil er **in seiner eigenen Welt** war.)
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To build a strong foundation for future success.
learning through difficult experiences in life
to surprise or defeat completely
assistance or support
an ambitious person who achieves their goals