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。

youdao

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。

youdao