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唐库班珀拉胡火
的警戒
由“正常”提高到“警告”,三级警戒的中间等级,因为这两座火
近来定期喷
火
灰,
隆隆的声音。