IndiGo航空今年创造了全球历史上最大的单笔飞机订单记录。
IndiGo Airlines made history this year with the single largest aircraft deal in global history.
自从2003年开始开发这种16毫米图像亮度放大管起，这次是最大的一笔单笔订单。
This is the largest single award of 16-mm aviation tubes since the programs entered development in 2003.
这个压扁的符号让誊写者用单笔划结束书信。
The compressed symbol allowed the transcriber to complete the letter in a single stroke.
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