The mechanics work hard to keep the helicopters airworthy.
机修工努力维持直升机的飞行性能。
All our aircraft have certificates of airworthiness.
我们所有的飞机都有适航证书。
👨🏻🏫 Mr. Ng 柯林斯詞典 📚 – collins.mister5️⃣.net切換為繁體中文