致命的航空事故越来越少。
Deadly airline crashes are increasingly rare.
youdao
交通安全调查员本周针对主要航空公司发生的航空事故召开听证会。
Transportation safety investigators held hearings this week into an accident that involved a major airline.
斯潘航空公司说尚不清楚事故原因。
Spanair said it did not know the cause of the crash.
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