at a premium
adv.在票面价值以上,非常珍贵
难易程度:
at a premium为短语/超纲词汇
近义词, 同义词
1. The premium system provides a strong motivation. 奖金制提供了强大的刺激。
2. Needless to say, the bigger the risk an insurance company takes, the higher the premium you will have to pay. 不用说,保险公司承担风险越大,你付的保险费也就越高。
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