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
He was in trouble with the Customs.
他在海关那里有了麻烦。
I wonder if you are on my side.
我不知道你是否站在我这边。
The sun was shining and the sky was crystal clear.
阳光闪烁，天空湛蓝。