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
for them and for myself and for Philip.
为他们， 为我自己和Philip。
Did you go play ball last night?
你昨晚去玩球了吗？
Liz, can you do me a favor?
李兹，帮个忙吧？