The tradeoffs between average speed of answer, service level, occupancy, telecom requirements and staff requirements.
平均应答时长，服务水平，占用率，中继线需求和员工需求之间的平衡；
The answer is that speed comes at the price of flexibility.
答案是，速度的获得以灵活性的失去为代价。
The answer is simple: Space of an observer expands with increasing speed at the expense of remaining time reserves for the future.
答案很简单：一个观察者的空间以逐渐增加的速度膨胀，代价是为未来储存时间。
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