be up to sth
查询英语单词中文释义、音标、发音和例句。
be up to sth
英
[be up to sth]
美
[be up to sth]
中文释义
偷偷摸摸做某事
单词分析
单词结构:
be up to sth
字母数:12
记忆提示
🎯 重点记忆:
- 单词拼写:be up to sth
- 核心含义:偷偷摸摸做某事
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更新时间:2026-09-21 06:42:37