邮件限额的基本配置是设置一个最大的限制值和一个警告门限，即使用户达到他们的限额后仍允许他们发送、接收和管理消息。
The basic configuration of mail quotas is to set a maximum size limit and a warning threshold, allowing users to send, to receive, and to manage messages even after they have reached their quota.
接受调查的半数美国人仍赞成限排和碳排政策，也赞成让企业支付排放费——这也是参议院限额交易法案的基本要素。
Half of Americans polled remain in favour of putting limits and carbon emissions and making companies pay for their emissions — the basics of the cap and trade bill now before the Senate.
确定了基本医疗界线、范围和标准，确定了费用限额；
The concept of basic medical care and its scope and the maximum expense was defined.
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