一级的的用法和样例:
例句
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那是第一级的邮件,收到时却处于第二级的状态。
It arrive by first-class mail in second-class condition.
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那是第一级的邮件,收到时却处于第二级状态。
It arrived by first-class mail in second-class condition.
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必须具备大专院校的学位才能从事这一级的工作。
A degree is prerequisite for employment at this level.
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