Efc
abbr. earth fixed coordinate 固定坐标系; electronic feedback carburetor 电子反馈汽化器; engineered for color 彩色（电视机）工程; Evergreen Fir Corporation (initials) 常青枞树公司（组织名称的第一个字母）
🗣️ 情景例句
I think so. He's going to tell us tonight about the job offer.
我想是这样。他今天晚上会告诉我们关于那份工作的事。
I won't argue with you,but I think you're being unfair.
我不会与你争论，但是我认为你不公平。
I've got it.
我懂了。