Rigas Doganis is an aviation-industry commentator.

里加斯·东佳尼斯是一位航空界的评论员。

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“They’ve put rings on each others’ fingers, but we may have to wait for several years for the consummation,” says Rigas Doganis, an aviation-industry commentator.

Rigas Donganis，一位航空界的分析家，评论到，“他们已经为交换了各自的戒指，但最终的美满我们可能还要等上几年。”

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Professor Rigas Doganis, visiting professor at the UK's College of Aeonautics at Cranfield University, said new aircraft types tended to experience teething problems.

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