It's a bit inconsiderate of her not to let you know when she expects to arrive.
她不让你知道她什么时候会到，这样做有些不体谅人。
You'd have to know when he created his paintings.
你得知道他是什么时候创作画作的。
Leaving the most important tip for being a good guest is to know when to say goodbye.
作为一个好客人，给你最重要的提示是知道什么时候说再见。
Like most tools, you need to know when and how to use it to the best advantage.
与大多数工具一样，您需要知道何时以及如何充分利用它。
A driver takes the minibus to a certain place at a certain time, so people know when to expect it.
司机会在特定的时间开小型巴士去特定的地方，所以人们知道什么时候会有小型巴士来。
Allen is said to have been designing a new computer program recently, but I don't know when she will finish it.
听说艾伦最近在设计一个新的电脑程序，但我不知道她什么时候能完成。
Active learners are constantly monitoring their understanding, they know when their comprehension breaks down, and they ask for help before they become lost.
主动学习者不断地监测自己的理解，他们知道自己的理解什么时候出现了问题，在迷失方向之前就会寻求帮助。
I know when the journey began—the day Mom snapped off the TV set and put us in her Oldsmobile for that drive to the library.
我知道旅程是什么时候开始的——那天妈妈关掉电视机，让我们坐上她的 Oldsmobile去图书馆。
Put up a copy of your study guide at home so you and your family can see it, and email a copy to your friends so they know when you have spare time.
在家里放一份学习指南，这样你和你的家人就可以看到它，并通过电子邮件发一份给你的朋友，这样他们就知道你什么时候有空闲时间。
It was important to the ancient Egyptians to know when their Nile based seasons would occur, their way of life depended upon it.
对古埃及人来说，知道尼罗河季节的时间是很重要的，他们的生活方式取决于尼罗河季节什么时候来临。
Do you know when I first started loving you? That night at the dinner table when you sat on the ridiculous pine cone.
你知道我什么时候开始爱上你的吗？那天晚上在餐桌上，当你坐到滑稽的松果上时。
Big armies can wipe you out, but they are easy to find, easy to distinguish, and you know when you have beaten them.
大规模的军队可以消灭你，但是他们很容易被发现，容易区别，而且在你打击他们时你知道该做些什么。
I don't know what and I don't know when, but I know it's going to happen.
我不知道是什么，我不知道什么时候，但我知道它将会发生。
This mode is useful in situations where you know when a task starts and stops but have no way of knowing how far the task has progressed.
这种模式在这样几种情形下是有用的，您可以知道一项任务何时开始以及何时停止，但是您没法知道任务进展了多远。
Now, as you know, when you apply for a post with our company, we need to find out a few things about both your academic background and recent work experience.
现在，如你所知，当你申请我们公司的职位时，我们需要了解一下你的学术背景和最近的工作经历。
How do we know when to invest in an upgrade?
我们如何知道何时投资升级？
Do you know when the library closes every day?
你知道图书馆每天什么时候关门吗？
Do you know when Havoc in Heaven was created?
你知道动画片《大闹天宫》是什么时候制作的吗？
Do you know when The Belt and Road Forum began?
你知道“一带一路”高峰论坛是什么时候开始的吗？
Do you know when we will have the singing competition?
你知道我们什么时候举行歌唱比赛吗？
Do you know when he will show me around his factory?
你知道他什么时候带我去参观他的工厂吗？
Do you know when Tianwen 1 landed on the red planet?
你知道天问1号是什么时候登陆这颗红色星球的吗？
You bet. Just let me know when, and I'll be there.
没问题。告诉我时间，我会来的。
Do you know when the 2018 Football World Cup will end?
你知道2018年足球世界杯什么时候结束吗？
Do you know when China's Tianwen-1 probe landed on Mars?
你知道中国的“天问一号”探测器是什么时候登陆火星的吗？
Do you know when the end-of-term concert will begin, Alfred?
阿尔弗雷德，你知道期末音乐会什么时候开始吗？
Do you know when the exchange students will come to our school?
你知道交换生什么时候来我们学校吗？
Do you know when Mrs. White will come for dinner this evening?
你知道怀特夫人今晚什么时候来吃饭吗？
I believe your fish will surely know when it is feeding time.
我相信你的鱼一定会知道什么时候是喂食时间。
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