The mechanics work hard to keep the helicopters airworthy.机修工努力维持直升机的飞行性能。The airplane is airworthy.这架飞机是适于飞行的.The mechanics work hard to keep the he-licopters airworthy.机修工努力维持直升机的飞行性能。The planes were certified airworth...

歪长石...

and so forth的音标：and so forth的英式发音音标为：[ænd səʊ fɔ:θ]and so forth的美式发音音标为：[ənd soʊ fɔrθ]...