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

和唐库班珀拉胡



度由“正常”提高到“
告”,三级

中间等级,因为这两座
近来定期喷出
灰,并发出隆隆
声音。
们在那里加入了
大的





