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



“正常”提高到“
告”,三级

中间等级,因为这两座火山近来定期喷出火山灰,并发出隆隆
声音。



种形式之间目前存

引导更仔细地权衡并更重视它


