The fast and slow waves can both propagate in the waveguide system.

快波和慢波都可以在这种波导中传播。

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But as the Times recently reported, fast food is proliferating across the Mediterranean region, threatening to propagate a U. S. -style obesity epidemic.

但是根据时代的最近报道指出，快餐已经在地中海地区蔓延开来，一种美国式的肥胖传染病正快速传播开来构成威胁。

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But as the Times recently reported, fast food is proliferating across the Mediterranean region, threatening to propagate a U. S. -style obesity epidemic.

但是根据时代的最近报道指出，快餐已经在地中海地区蔓延开来，一种美国式的肥胖传染病正快速传播开来构成威胁。

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