xi英 [saɪ]美 [saɪ]n. 希腊字母表的第14个字母复数:xis BNC.10505牛津词典noun希腊字母表的第14个字母the 14th letter of the Greek alphabet (Ξ, ξ)英英释义nounthe 14th letter of the Greek alphabetadjbeing one more than tenSynonym:eleven11