Fac
abbr. 空军前进引导员（forward air controller）；联邦咨询委员会（Federal Advisory Council）；联邦航空委员会（Federal Aviation Commission）
🗣️ 情景例句
Oh, it was no trouble.
哦 没什么麻烦。
Every salesman boasts of his own wares.
老王卖瓜，自卖自夸。
engineers may soon be free to let their imaginations soar without being penalized by expensive failures.
因此，工程技术人员可能很块就可充分发挥他们的想像力，而不会因失败而造成经济上的损失。