You can work an FAA Repair Station or FBO under the supervision of a certified mechanic for 18 months for each certificate, or 30 months for both.是什么意思_You can work an FAA Repair Station or FBO under the supervision of a certified mechanic for 18 months for each certificate, or 30 months for both.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句