You cannot live your children's lives for them; you can only be there to pick up the pieces when things go wrong.
你不能替孩子过活，只能在出现问题时帮忙解决。
Only then can they hope to describe conditions at the Big Bang, when all space and time was compressed into a volume far smaller than a proton.
只有那样他们才能指望描述大爆炸的情况，所有的空间和时间全部在那时被压缩成一个远小于质子的体积。
I am sure you all know from physics class about how light moves in microscopic ways and that we can only see light when the wavelength of that light is in a specific range.
我相信，你们在物理课上都学过光是如何以微观的方式运动的，以及只有在光的波长在特定的范围内时我们才能看到光这一事实。
"Only when the Tooth Fairy buys the lost tooth from us, can we grow a new tooth." Logan nodded.
“只有牙仙把掉的牙买回来，我们才能长出一颗新牙。”洛根点了点头。
Only when we react to emergencies in life calmly, can we solve problems in a better way.
只有当我们冷静应对紧急状况时，我们才能更好地解决问题。
Only when advanced countries extend a helping hand to developing countries, can the world be a better place.
只有当先进国家向发展中国家伸出援助之手时，世界才能变得更好。
Only when all of us join efforts to eliminate pollution at all levels can we expect to have a better environment.
只有当我们所有人共同努力消除各种污染时，我们才能期望有一个更好的环境。
Only when all of us join hand in hand to eliminate noise pollution at all levels, can we have a better environment and a more beautiful future.
只有当我们所有人携手消除各级噪音污染时，我们才能拥有更好的环境和更美好的未来。
Based on excavations, we can know the layout of the houses and the location of the graves, but we're only guessing when we tried to say why they did it that way.
根据挖掘的情况，我们可以知道房子的布局和坟墓的位置，但是我们试图解释他们这样做的原因时只是瞎猜而已。
When Hobbes tells that story, one can only imagine he must have had a kind of wry grin on his face when he wrote that out.
当霍布斯讲这个故事的时候，我们可以想象当他写出来的时候，他脸上呈现的会是怎样的苦笑。
Ideas can only be remembered when they are repeated.
观点只有被重复才能被记住。
Some people think drones can only be used by governments to help when needed.
一些人认为只能由政府在需要的时候使用无人机提供帮助。
Many youths can only get through by borrowing money, and it means they have to earn more money when they graduate.
许多年轻人只能通过借钱来度过难关，这意味着他们毕业后必须赚更多的钱。
The total amount of damage to Notre Dame Cathedral can be assessed only when its structure is considered safe.
只有在巴黎圣母院结构安全的情况下才能评估其损失总额。
At mid-century, an Antwerp financier only slightly exaggerated when he claimed, "One can no more trade without bills of an exchange than sail without water."
在这个世纪中叶，一位安特卫普的金融家略微夸张地说道：“没有汇票就不能交易，正如没有水就不能航行一样。”
I only care when it can be done.
我只关心它什么时候能完成。
Only when you take care of yourself can you help others better.
只有照顾好自己才能更好地帮助别人。
They can only land once—the time when they die.
它们只能落地一次——那就是死亡的时候。
Maybe the story is telling us if we don't look after the planet, a day will come when flowers can only grow on the moon.
也许这个故事告诉我们，如果我们不爱护这个星球，总有一天，花就只能在月球上生长。
We can't appreciate these kinds of details without seeing works of art as they originally appeared—something Smith believes you can do only when you have a road map.
在没有看到艺术品最初的样子时，我们根本无法欣赏到这些细节。而史密斯认为，只有当你拥有成品的路线图了，你才能领会到这些细节的美。
That's because when you know where your goal is, you can only prepare yourself well in the mind.
这是因为当你知道目标在哪里时，你只能在心里做好准备。
I prefer having classes online because you can spend more time learning when you're the only student in "your class".
我更喜欢上网课，因为“班上”就你一个学生，你可以花更多时间去学习。
Only when it has been chewed up and digested almost to a liquid can the food pass through the rumen and on through the gut.
只有在食物被咀嚼并几乎消化到液态后，它才能通过瘤胃进入肠道。
Now she can speak Chinese very well, but five years ago, when she first came, she could only speak it a little.
现在她中文说得很好，但五年前她刚来时还说不了几句。
But only when they have confidence that they can recover this state can people be truly courageous in what they do.
但是，仅仅是当他们有信心他们能够恢复到这个状态时，人们才会真的有勇气这样做。
Because you feel loved. And you can only feel loved when you give that love to others.
因为你感觉到了被爱，就在你刚刚将你的爱给别人的同时。
There are many dangers online and many variables with each individual personality - only you can decide when they are ready.
网络上存在着很多的危险以及各种各样的个性特点——除非你能确定什么时候他们准备好了。
The result is that the workload can only get serviced when there is no competition for resources.
这样的结果在于，仅当没有资源竞争时才能为工作负载提供服务。
Only when the application starts can the resource adapter verify whether properties such as host names and port Numbers are correct.
只有当应用程序启动时，资源适配器才能验证类似于主机名称和端口号这样的属性是否正确。
You can only buy when everyone else is selling if you have held your fire when everyone was buying.
如果人人都在买进时你做到了按兵不动，那么只有在人人都抛售时你才能买进。
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