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 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。
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 we're polite to others, can we maintain a pleasant relationship with them.
只有当我们待人礼貌时，我们才能和他人维持愉快的关系。
Only when everyone strive for their own dreams can we realize the Chinese Dream.
只有当每个人为了自己的梦想而奋斗的时候，我们才能实现中国梦。
Only when we make full preparations for every coming opportunities, can we succeed one day.
只有当我们为每一个即将到来的机会做好充分的准备时，我们才能在某一天获得成功。
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。
"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 follow the laws of nature, can we better get along with it.
我们只有遵循自然法则才能更好地与环境和谐共处。
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。
Only when a reservoir is built here can we solve our irrigation problem.
除非在这里修个水库，才能解决灌溉问题。
In fact, we can only love others authentically when we love ourselves.
事实上，只有当我们在爱自己时，我们才能真正地爱他人。
Only when we are able to bring these masks into our active awareness and deal with them, can we be ourselves and experience the freedom that brings.
只有当我们能够有意识的带着及处理这些面具，我们才会是我们自己并能体会到这些面具带来的自由。
Even when we streamline our test cases to only those that "should pass," we can fall into this trap.
即使当我们将我们的测试用例流线处理为那些只“应该通过”的内容时，我们也可能落入该圈套。
Perhaps only when we are in such networks can we construct a meaningful map of the world.
也许只有当我们身处与这样的网络时，我们才能建立一幅意义深远的世界地图。
Only when we combine these two kinds of factors can we [have] a full picture of the DNA of the economy.
只有当我们将这两个要素结合进来，我们才能【得到】经济体的DNA的整全面貌。
We need money for many different things, and only when we work, we can earn money. And work can also help us feel that we are useful.
还有很多不同的东西我们都需要花钱，只有当我们工作了我们才能够挣到钱，而且工作可以让我们觉得自己是有价值的人。
We will only begin to forgive when we can look upon the wrongdoers as ourselves, neither better nor worse.
只有当我们愿意将做错事的人看做是我们自己，他们并不比我们好或者差，我们才可能开始宽恕他们。
This implies that two heads may be better than one, but only when we can competently discuss our different perspectives.
这意味着三个臭皮匠虽然可以顶过诸葛亮，但这只有在我们能够开诚布公的讨论自己不同的看法观点时才行。
Our only question: when can we start using these apps?
我们目前唯一的问题是：什么时候才能用上这套运输系统？
It's only when we combine the diagrams and the constraints that we can completely specify the model.
当我们合并图表和约束时，才能够完整地指定模型。
We make judgements about people, but when we believe that only our assumption can possibly be correct, we fall into this trap.
我们判断其他人行为，但是当我们相信只有我们自己的设想可能是正确的，我们就陷入了一个陷阱。
The cycle of unproductive insanity caused by the illusion of "busy" can only be broken when we consciously and deliberately decide to put an end to it.
那种徒然的荒谬是由“忙碌”的幻像造成的，当你意识到了这点并决定去做一个了解的时候，你才能打破这个循环。
The cycle of unproductive insanity caused by the illusion of "busy" can only be broken when we consciously and deliberately decide to put an end to it.
那种徒然的荒谬是由“忙碌”的幻像造成的，当你意识到了这点并决定去做一个了解的时候，你才能打破这个循环。
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