noun🔗Share左矢，左括向量 One of the two vectors in the standard notation for describing quantum states in quantum mechanics, the other being the ket."In quantum mechanics lectures, students learn to distinguish between "kets" and their corresponding "bras," which are essential for describing the probability amplitudes of quantum states. "在量子力学课程中，学生们会学习区分“右矢”（ket）和它们对应的“左矢”（bras），它们对于描述量子态的概率幅至关重要。physicstheorymathChat with AIVocabulary GamePractice Reading
noun🔗Share哥们， 朋友。 Friend"Take it easy, bra!"放轻松，哥们！personfamilygroupChat with AIVocabulary GamePractice Reading
noun🔗Share姐妹，闺蜜 Female version of bro""Even though Sarah and I just met, we instantly clicked and now we're total bras who support each other's goals." "即使我和萨拉才认识，我们却一见如故，现在是互相支持对方目标的铁杆姐妹了。personhumanfamilylanguageChat with AIVocabulary GamePractice Reading
noun🔗Share乳罩，胸罩 An item of underwear worn to support the breasts; now commonly shortened to bra."She bought two new bras at the department store because her old ones were uncomfortable. "她在大百貨公司買了兩個新胸罩，因為她舊的那些穿起來不舒服。wearitembodyChat with AIVocabulary GamePractice Reading
