prahu

Scientists on Wednesday raised the alert level for Anak Krakatoa and Tangkuban Prahu -- which regularly spew gas and rumble -- from "normal" to "warning," the middle of three alert levels.

，科学家们将喀拉喀托火山和唐库班珀拉胡火山的警戒度由“正常”提高到“警告”，级警戒的中等级，因为这两座火山近来定期喷出火山灰，并发出隆隆的声音。