noun 下载 🔗分享 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. Examples : "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。 physics theory math 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 姐妹，闺蜜 Female version of bro Examples : ""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。 person human family language 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 乳罩，胸罩 An item of underwear worn to support the breasts; now commonly shortened to bra. Examples : "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。 wear item body 与AI对话词汇游戏阅读练习
