Even if a pattern of behaviour is almost universal, we can't know in advance if it is a law of nature we cannot change or simply a remnant of our primitive past that we can and should modify.
即使一种行为模式是近乎普世的，我们也无法预先知道它究竟是一个我们不能改变的自然法则，还是只是一种我们能够并且应该改变的原始陋习。
If we predict the partition time in advance, we cannot avoid nodes receiving many redundant messages.
现在，我们假设可以预测区分时间，我们不能避免节点接收到多余的信息。
Yes, Sir. If you cannot be present on that date. Please notify us at least one week in advance.
是的，先生，如果您那天不能出席，请至少一星期前通知我们。
Unfortunately, they don't advance much and I cannot tell you when they will be finished or even if they will actually be made.
不幸地是，它们进展不大，我无法告诉你它们什么时候能被完成甚至是否它们最终会被制作。
If you cannot make it to class or cannot prepare for the case discussion, please let the instructors know 24 hours in advance.
如果你不能在上课前完成或是准备好上课的讨论，请在24小时之前知会助教。
If you cannot handle the business on time, please cancel the reservation by your passport No. or serial No. in advance one day at least.
如不能按时前往，可使用护照号或预约编号提前一天取消申请。
On the appointed day, contact the customers to confirm whether they will come or not one hour in advance; if they cannot come on time, reschedule the time for them.
个小时与用户确认是否来访，如不能按时到访，为用户改约时间；
On the appointed day, contact the customers to confirm whether they will come or not one hour in advance; if they cannot come on time, reschedule the time for them.
个小时与用户确认是否来访，如不能按时到访，为用户改约时间；
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