Efficiency of boiler
[机] 锅炉效率
🧩 词语组成解析
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
🗣️ 情景例句
Maybe Lillian will be at the reunion.
或许Lillian也会参加聚会。
Hello. Can I see Mr. Green?
你好，我能见格林先生吗？
He is swimming across the river.
他正横渡小河。