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
拉

山和唐库班珀拉胡
山
警
度由“正常”提高到“警告”,三级警

间等级,因为这两座
山近来定期喷出
山灰,并发出隆隆
声音。



种形式之
下,我们将被引导更仔细地权衡并更重视它们之


