Army-navy grades of gasoline
[机] 陆海军军用汽油等级
🧩 词语组成解析
n. 分数；等级（grade的复数形式）
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
Now that you're asked me, I think it's too short.
既然你问我了，我的想法是这部分太短了。
Look before you leap.
三思而后行。
But for the English examination, I would have gone to the concert last Sunday.
上个星期天，要不是有英语考试， 我就去听音乐会了。