The phone comes into play when there are multiple options to consider or important decisions to be made.
当有多种选择要考虑，或者有重要的决定要做时，手机就开始发挥作用了。
My dad would only go shopping when there was nothing in the fridge.
我爸爸只有在冰箱里什么都没有的时候才会去购物。
It's great because we play cards or just sit around and talk when there are no customers.
太好了，因为没有客户的时候我们会打牌或坐成一圈聊天。
Don't cry wolf when there is no wolf!
没有狼来不要喊狼来了！
Astronomical cycles have an effect on Earth's climate even during periods when there is no glaciation.
即使在没有冰川的时期，天文周期也会对地球的气候产生影响。
Several times lately, I have lain wakeful when there sounded the first note of the earliest lark, which makes me almost glad of my restless nights.
最近有几次，当最早的云雀发出第一声鸣叫时，我躺在床上睡不着觉，这使我几乎为自己的多少个不眠之夜感到欣然。
They had just finished their meal and resumed their arm-chairs, when there came a heavy knock at the door.
他们刚吃完饭，又坐到扶手椅上，这时，传来了重重的敲门声。
We had reached the point when there was no money left.
我们曾落到身无分文的地步。
Keep cool when there is a problem.
出现问题时要保持冷静。
In the long run, electricity from large wind farms in remote areas might be used to make hydrogen gas from water during periods when there is less than peak demand for electricity.
从长远来看，在电力需求低于峰值的时期，偏远地区的大型风力发电场的电力可能会被用于电解水，以产生氢气。
Do not use elevators when there is a fire.
发生火灾时避免使用电梯。
Can you remember when there were no computers?
你是否记得那没有电脑的时光？
And all knowledge is vain save when there is work.
一切知识都是徒然的，除非有了工作。
Life was so much easier when there were fewer options.
我想如果没有这么多选择的话，我的生活会轻松得多。
And we'll contact you when there is a job that suits you.
一有适合你的工作我们将与你联系。
Think twice even when there is only one negative reference.
即便只有一个负面的意见，你也要三思而后行。
The situation only improves when there are more people trying;
当有更多的人去努力的时候，情况肯定会有所好转；
And I say that life is indeed darkness save when there is urge.
而我说生活的确是黑暗的，除非有了渴望。
My daughter gets so excited when there is a food drive at school.
学校的食品募捐活动让我的女儿变得非常的兴奋。
He was just falling asleep when there was a loud knock at the door.
他刚要入睡，就有人大声敲门。
She retained her oratorical bounce when there was so much more to do.
尽管还有许多事情要做，她仍然保持着演说家的活力。
On days when there is no school, Ramiz likes to go to work with his dad.
在无学可上的日子，拉米兹喜欢跟着爸爸去上班。
Who needs space when there remain the unfathomable depths of our own oceans?
当我们有深不可测的海洋时，谁还需要空间？
Like the hunters, the bears can't find seals when there is so little sea ice.
像猎人一样，在海冰如此少的时候，北极熊找不到海豹。
I love it when there are entire hillsides with colorful and bright aspens.
我爱那漫山遍野彩色和明亮的山杨树！
It is an easy way for sites to tell people when there is new content available.
它可以让网站更方便地告知访客什么时候有更新。
Do you know when there will be more of these available, especially with larger screens?
你知道什么时候会有更多选择，尤其是屏幕更大的型号？
Do you know when there will be more of these available, especially with larger screens?
你知道什么时候会有更多选择，尤其是屏幕更大的型号？
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