engine operating hou
查询英语单词中文释义、音标、发音和例句。
engine operating hour
英
[engine operating hour]
美
[engine operating hour]
中文释义
发动机运转时数
单词分析
单词结构：
engine operating hour
字母数：21
记忆提示
🎯 重点记忆：
- 单词拼写：engine operating hour
- 核心含义：发动机运转时数
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更新时间：2026-08-29 17:48:53