Because if they get lost, it takes ages before anyone notices that they're missing.
因为他们要是不见了，很长时间都不会有人注意到这事儿。
And of course, you do get extra message flows if messages are lost, as in that case they will have to be resent.
当然，如果消息丢失，也会有对应流程予以处理，比如在本例中是重发。
If users get lost on a website, they leave.
如果用户在站点上迷失，他们会离开。
If you keep changing fonts, sizes and colors throughout the website, users will quickly get lost in what they are doing.
如果你在整个网站持续改变字体、大小和色彩，用户很快会觉得不知所措。
These agents aren't necessarily visible at the application level, they simply ensure that the messages get re-transmitted if lost or undelivered.
在应用层级，这些代理是不可见的，它们保证在消息丢失或未到达时重新传输消息。
The donkeys are equipped with GPS so staff can take action if there is a fire or they get lost.
驴子身上还配备着GPS卫星定位系统，万一所到之处发生火灾或走失，有关单位就可迅速掌握情况，派人赶到现场。
So even if you've lost and regained weight countless times, don't give up. Yo-yo diets don't hurt you; they just don't get you anywhere.
所以，即使你的体重已经无数次的起起伏伏，但你也不要放弃。
If they can't get reach you, advise them to approach someone in authority - whether that be a policeman, a shop assistant, a traffic warden, or someone similar, and explain that they are lost.
如果他们联系不上你，建议他们寻求权威人士的帮助—无论是警察、店员、交通管理员或者是类似的人，然后解释说自己迷路了。
Most cell phone users only use the dialing and address book functionality and quickly get lost if they try to access other functions.
他们若试图使用其他功能，则很容易迷失在层次结构的菜单中。
Where the people are very friendly, if you get lost, they can help you.
那里的人很友好，假如你迷路了，他们能帮忙你。
If you are lost, you can ask how their day went, when they get back home from work.
如果你无法继续话题，你可以问些他们的一天是如何度过的，他们什么时候下班回家？
There are some new products and devices that can help parents keep track of their kids, keep them safe if they do get lost, and give you piece of mind while they're playing and having fun.
现在，有一些新产品和设施来帮助父母时刻知道自己孩子的行踪。如果小孩走失，可以确定他们的安全。
If you have more than one screen, you may find the window occasionally get lost, perhaps because they are closing on the screen.
如果您有多个屏幕作业，你可能会发现偶然窗户走失，或许是因为他们在屏幕上正在封闭。
If you have more than one screen, you may find the window occasionally get lost, perhaps because they are closing on the screen.
如果您有多个屏幕作业，你可能会发现偶然窗户走失，或许是因为他们在屏幕上正在封闭。
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