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
Surprise parties don't always work out.
惊喜派对不是每次都成功的。
I feel guilty because I haven't written her lately.
因为我最近没给她写信，我感觉到有罪。
We could make them lower for you.
我们可以算你便宜一点。