这些使用量波动是某些业务过程造成的，比如月底的结帐和报告。
These fluctuations in usage happen as part of the business process, such as end-of-month billing and reporting.
每到月底，银行会寄回你开出的支票和兑现的支票，以及所有用过的支票兑账单。
At the end of the month, the bank returns the checks that they have written and have been cashed. The bank also sends a statement of all the checks used.
经过健康检查和其他的程序后，这两只大熊猫将在三月底正式开始与大众见面。
The two are expected to debut for the public in late March following health checks and other procedures.
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