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
It's about the size of the United States, but it has a population of only 16.5 million.
它和美国一般大，但人口却只有一千六百五十万。
We're jumping about in excitement at the discovery.
我们因为这一发现而兴奋得手舞足蹈。
Of course.You can pay a deposit of thirty pounds, and then fourteen pounds a month for three years.
当然可以。您可以先付30英镑定金，然后每月14镑，3年付清。