输注红细胞引起细菌感染是极罕见的输血并发症，数量级为每百万次输血发生一例。
Infection with bacteria due to a blood transfusion is an extremely rare complication with red cell transfusions, in the order of one per million transfusions.
仍在广泛使用的麦道公司(McDonnell Douglas)的MD- 80型飞机，每百万次飞行发生的致命事故数是0.31。
The McDonnell Douglas MD-80, still widely in use, has a fatal accident rate of 0.31 per million departures.
仍在广泛使用的麦道公司(McDonnell Douglas)的MD- 80型飞机，每百万次飞行发生的致命事故数是0.31。
The McDonnell Douglas MD-80, still widely in use, has a fatal accident rate of 0.31 per million departures.
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