硬聚氯乙烯 ; 聚氯乙烯 ; 聚乙烯 ; 硬质聚氯乙烯
吴丹 ; 长宇谭
瑜卤允浩 ; 郑允浩 ; 允浩 ; 东方神起
U (named u /ˈjuː/, plural ues) is the twenty-first letter in the ISO basic Latin alphabet and a vowel in the English alphabet.