The engine was very smooth in operation but had one very marked disadvantage-thermal efficiency was only about 4 %.

该机在运转方面是很平稳的，但有一个明显的缺点，热效率仅为4 ％左右。

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At the Deutsche Bank Aviation and Transportation Conference held recently, American Airlines denied seeking bankruptcy liquidation (Chapter 7) but did not rule out the possibility of seeking bankruptcy protection (Chapter 11) to reorganize its labor agreements that put it at a marked disadvantage to airline industry peers such as Delta Air Lines, Southwest Airlines, US Airways and United Continental.

FORBES: AMR Could Play Bankruptcy Card To Break Labor Logjam