u
the letter U
Letter name · 字母名称the 21st letter of the English alphabet
英文字母 U（第 21 个字母）
Source: BridgeDict Latin alphabet catalog
未分类的
先理解核心含义，再看它在真实句子里的用法。
未分类的
unclassified
His pronunciation is very u.
他的发音非常上流社会。
通常用于括号中，是 unclassified 的缩写。
The noun sense means the letter itself. Scientific meanings appear only when their capitalization exactly matches your query.
the 21st letter of the English alphabet
英文字母 U（第 21 个字母）
Source: BridgeDict Latin alphabet catalog
未分类(unclassified)的缩写,常用于括号中。
Usually in parentheses: abbreviation of unclassified.
The report was labeled (u) because the committee hadn't finished reviewing it.
这份报告被标为（u），因为委员会尚未完成审查。
Please sort the photographs into a separate pile if they are marked (u).
如果照片标有（u），请把它们单独放成一摞。
The archivist found a box of slides labeled (u) from the 1980s.
档案管理员发现了一盒上世纪80年代的幻灯片，上面标着（u）。
常大写为U
His pronunciation is very u.
他的发音非常上流社会。
She uses u vocabulary in her speech.
她在演讲中使用上流社会的词汇。
固定短语，常大写为U and Non-U
The distinction between u and non-u words is clear.
上流社会与非上流社会用词的区别很明显。
Choose the next layer that will help you use u with more confidence.
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Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
Use u naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
Used chiefly in British English to describe something appropriate to the upper classes, especially in language use.
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY, BridgeDict Latin alphabet catalog.