> 首先介绍剑桥五级语言等级（The Five Level Scale） 剑桥大学英文认证考试是和欧洲语言考试联盟（ALTE）所建立的国际五级语言等级联系在一起的，受到欧洲语系地区广泛的采用。
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On Friday officials raised the alert level at the plant from four to five on a seven-point international scale of atomic incidents.
周五，官方将本次事件的警报级别从四级提高到五级，而核事故的国际标准仅有七级。
The WHO has so far left its six-level pandemic alert scale unchanged at phase five, signalling that a pandemic is "imminent."
迄今为止，世卫组织已已让六级流行警告级别保持在5级不变，表明一场流感大流行迫在眉睫。
Japan's Nuclear and Industrial Safety Agency raised the crisis alert level from level five to seven, the highest level on the scale. (Athit Perawongmetha/Getty Images)
日本核电和工业安全机构上调了核危机严重等级，从5级上升到7级，7级是最高等级。
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