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...
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 airplane is airworthy.这架飞机是适于飞行的.Crews were even dispatched to determine if any of the aircraft could be made airworthy.全体机组人员甚至被派去确定所有飞机的性能都...
探求一般性和统一性,是二十世纪数学的突出特征之一.The search for generality and unification is one of the distinctive features of twentieth century mathematics.解题是一门艺术,统一性是数学固有的特点.Solution is an art. The unification is intrinsic characteristic o...