You can preset the radiators to come on when you need them to.
你可以预先调好暖气，使它在你需要的时候启动。
The teacher did her best to cheer me on when I was about to give up.
当我快要放弃时老师尽力鼓励我。
Click on the icon when you want to print.
你想打印时就点击一下这个图标。
I leave a light on when I'm out to discourage burglars.
我出门时开着灯以防夜盗闯入。
He has her support to fall back on when the going gets tough.
当进展艰难时，他可以依赖她的支持。
Any recommendation on when to use which?
在使用时有何建议？
I was always trying it on when visiting her as a child.
小时候每次去看奶奶，我都要戴一戴它。
Don't leave the light on when you are not in the room.
不在房间的时候别让灯开着。
There you go - some basic tips on when to restore your iPhone.
当你要恢复你的iPhone的时候，这里有你需要一些基本的技巧。
The final cost also depends on when the totting-up is done.
最终花销也取决于什么时候清算能够完成。
That must depend on when and how the great contraction ends.
这必然取决于本次经济大收缩何时、以及如何结束。
Now may be the same thing is going on when people talk about minds.
现在也许发生了同样的事情，人们讨论精神时。
And the earphones you put on when your roommates make too much noise.
还有当室友太吵时，你戴上的耳机。
What on earth did they think was going on when the ship went aground?
他们到底在船只搁浅时心里在想些什么？
The doctor gave me explicit instructions on when and how to take the medicine.
大夫详细地告诉我该何时服药以及如何服药。
But there are common threads that most men will agree on when looking for Ms. Right.
但他们在寻觅佳人之时，有些方面却是大部分男人的共识。
Control what data can be seen and acted on when collaborating on a two-way form.
在双向表单上协作时，控制可以看见和操作的数据。
Can you provide some kind of decision framework on when each one is more applicable?
对于什么时候两者之间某个更适用，你能提供一点帮助决策的参考吗？
“Even though the panel will not be large enough to power the entire car, it could provide enough power to switch the engine off and on when the car is stopped at a traffic light, ” he said.
“尽管面板不能提供整辆车的动力，但是当车遇红灯停下时，它足以提供发动机熄火和启动所需的能量了。”他继续说。
When parking on a hill, leave the car in gear.
在斜坡上停车时把汽车挂上挡。
When I'm on the soccer field, I'm at my happiest.
当我在足球场上时，我最开心了。
When did mammals appear on the earth?
地球上的哺乳动物起源于何时？
It's obscene to spend so much on food when millions are starving.
当数以百万的人忍饥挨饿时，饮食上挥霍无度是天理难容的。
This dress is too long—it drags on the ground when I walk.
这连衣裙太长了—我走路时就拖在地上。
Was any check made on Mr Morris when he applied for the post?
莫里斯先生申请这个职位时对他进行调查了吗？
My brother, Nick, was born on a Sunday, when all the church bells were ringing.
我的弟弟尼克，出生在一个星期天，当时所有教堂的钟都在鸣响。
My brother, Nick, was born on a Sunday, when all the church bells were ringing.
我的弟弟尼克，出生在一个星期天，当时所有教堂的钟都在鸣响。
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