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・He began to occupy himself with [by] solving those problems. それらの問題解決に取り組み出した.🔗⭐🔉
・He began to occupy himself with [by] solving those problems. それらの問題解決に取り組み出した.
研究社新英和大辞典 ページ 208561 での【・He began to occupy himself with [by] solving those problems. それらの問題解決に取り組み出した.】単語。