・The river is dangerous to swim in.＝That's a dangerous river to swim in.＝It's dangerous to swim in that river. あの川は泳ぐには危険だ.

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・The river is dangerous to swim in.＝That's a dangerous river to swim in.＝It's dangerous to swim in that river. あの川は泳ぐには危険だ.🔗⭐🔉

・The river is dangerous to swim in.＝That's a dangerous river to swim in.＝It's dangerous to swim in that river. あの川は泳ぐには危険だ.

研究社新英和大辞典ページ 182916 での【・The river is dangerous to swim in.＝That's a dangerous river to swim in.＝It's dangerous to swim in that river. あの川は泳ぐには危険だ.】単語。