直到最近，变革的实施被视为大型的结构工程；

Until recently, change implementations were regarded as largely structural undertakings;

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变革需要动力，变革需要理念，变革需要有能影响变革的实施手段。

There needs to be motivation. There needs to be a concept and there needs to be a means of implementation to affect change.

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联邦航空局认为，将货机飞行员也包括在内，将会增加实施这些变革的成本。货机是航空业的一大组成部分。

FAA determined that including pilots who fly cargo planes—a large segment of the aviation industry—would add too much to the cost of implementing the changes.

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