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出典:Wiktionary
Ultimately from Isaiah 2:4 of the Bible
to beat one's swords into ploughshares (三人称単数 現在形 beats one's swords into ploughshares, 現在分詞 beating one's swords into ploughshares, 過去形および過去分詞形 beat one's swords into ploughshares)
Usually accompanied with "and one's spears into pruning hooks"
beat swords into ploughshares