nounB1
理論、学説、説
an idea used to explain why something happens
例文
His theory explains why the ice melts so quickly here.
彼の理論は、なぜここで氷がそんなに速く溶けるのかを説明します。
In theory the plan sounds perfect, but reality is more complicated.
理論上はその計画は完璧に聞こえるが、現実はもっと複雑だ。
Students learn the basic theory before they try the experiment.
生徒たちは実験を試みる前に基礎理論を学ぶ。