1·Because P and S waves travel at different but fairly constant speeds, the interval between their arrivals increases in proportion to the distance from the earthquake focus, or initial rupture point.
由于 P 波和 S 波以不同但相当恒定的速度传播，它们到达的间隔与到震源或初始破裂点的距离成比例地增加。
2·Having only a vague idea of where we were going made planning difficult, but after a lot of discussion, and some long days' cycling, we were able to time our arrivals perfectly.
由于我们的行程不是很明确，所以要做出计划有点困难。但是在经过许多讨论和多天的长途骑行后，我们终于能准确地预报到达的时间。
3·Amazon SQS doesn't offer any call-back functionality or proactive notification of message arrivals.
Amazon SQS不提供任何回调功能或消息到达的预先通知。
4·Users can remain logged in at all times to be alerted of impending package arrivals. (They can also log in with each use to avoid prying eyes that might spoil gift surprises.)
用户可以始终保持登录状态，一旦有包裹即将到达，便能随时收到通报(当然，他们也可以只在需要使用Slice软件时才登录，避免好打听的人破坏用户安排的意外惊喜。)
5·Checks list of arrivals for the day, takes note of VIPs and other special instructions and requests and implements them.
监察每天的到达客人名单，记录下贵宾客人和其他特别指示或要求并根据要求完成。