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n. 擦伤；抓痕；刮擦声；乱写 | adj. 打...
n. 规模；比例；鳞；刻度；天平；数值范围 ...
拉斐拉·曼黛莉
NPR's Kathleen Schalch has more on this good news about safety in the skies.
NPR: For Air Travelers, More Safety and More Problems
NPR's Kathleen Schalch visited the plant and the CEO of the company who built it.
NPR: Canadian Dreams of Ethanol Distilled from Grass
As NPR's Kathleen Schalch reports, the FAA is now admitting these problems occurred.
NPR: FAA Accused of Ignoring Safety Warnings
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