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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。