noun 下载 🔗分享 Ξ，克西 The 14th letter of Classical and Modern Greek. The 15th in Ancient and Old Greek. Examples : "In my Greek alphabet practice, I always mix up xi (Ξ, ξ) with psi (Ψ, ψ) because they look similar. " 在练习希腊字母时，我总是把克西 (Ξ, ξ) 和普西 (Ψ, ψ) 搞混，因为它们看起来很像。 language writing character linguistics 与AI对话词汇游戏阅读练习
noun 下载 🔗分享 Ξ粒子， cascade 粒子 Either of a pair of hyperons having spin 1/2, which decay into a lambda particle and a pion. Examples : "After its creation in the high-energy collision, the xi quickly decayed into a lambda particle and a pion. " 在高能碰撞中产生后，这个Ξ粒子很快衰变为一个Λ粒子和一个π介子。 physics element 与AI对话词汇游戏阅读练习
