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.
上周三,科学家们将喀拉喀托火山和唐库班珀拉胡火山的警戒度“”提高到“警告”,三级警戒的中等级,因为这两座火山近来出火山灰,并发出隆隆的声音。