TatoebaMisterTrouserCC BY 2.0 FR和音声英音声𝑥² = −1 となる数 𝑥(実数ではない)を sqrt(−1) または i と記して虚数単位と言う。英語の訳When x² = −1, the number x (which is not a real number) is written as "sqrt(−1)" or "i", and is called the imaginary unit.出典: Tatoeba文番号 5058891