当刺激出现时，婴儿吮吸行为的变化被记录下来。
As stimuli were presented, changes in the infant's sucking behavior were recorded.
当新的刺激出现时，心脏和呼吸监测仪为研究者提供其心跳或呼吸的次数。
Heart and respiration monitors provide the investigator with the number of heartbeats or breaths taken when a new stimulus is presented.
当不同的生态系统出现时，我们可以这样解释：不同的生态系统形成的部分原因是岛屿形成过程的结果。
When varied ecosystems are present, they can be explained as resulting in part from the process that formed the islands.
他再次出现时，他正将步枪瞄准维德。
现时没有空位，但我会把你列入等候者名单的。
There are no places available right now but I'll put you on a waiting list.
当领导出现时，她走上前来，把自己准备的花递给他。
When the leader appeared, she came up and handed him the flowers she prepared.
八年前，当点点在芦苇丛中被发现时，她的情况如何？
How was Diandian when she was found in the reeds eight years ago?
当他们突然出现时，家人和邻居看到他们都很惊讶，但很高兴发现他们还活着。
When they suddenly appear, the family and neighbors are surprised to see them, but very pleased to find that they are alive.
在特定的时间和地点，当月虹恰巧出现时，如果你就在那里，千万不要错过它。
At a certain time and a certain place, when a moonbow happens to appear, you can't miss it if you're right there.
当我的朋友终于出现时，我把伞给了一位怀抱婴儿的女士，她刚到接送区。
When my friend finally showed up, I gave the umbrella to a lady carrying a baby who just arrived at the pickup area.
当潜水员道恩·沃特森向海绵专家克莱尔·古德温展示她的发现时，古德温确信这是一种在科学上未知的海绵。
When diver Dawn Watson showed sponge expert Claire Goodwin what she found, Goodwin was sure that it was a kind of sponge unknown to science.
当新的参与者出现时，会发生什么呢？
英雄出现时人们向他欢呼。
当你发现一些奇怪的想法出现时，最好不要压制它们。
It is better that when you find some strange ideas appear, you are not squashing them.
当贫穷出现时，即使是淘气的孩子也能理解它的含义。
When poverty shows itself, even mischievous boys understand what it means.
然而，当新事物出现时，我们往往连它的名字都不知道。
Yet, when something new turns up, more often than not, we do not even know its name.
当问题出现时，我们需要批判性地思考来决定如何解决它。
When a problem comes our way, we need to think critically to decide how to solve it.
当人类首次作为一个物种出现时，他们依旧跟多种类人猿共存。
When humans first emerged as a species, they shared the planet with many types of ape.
每当克里斯汀·迪奥的广告出现时，我们还是不得不翘起二郎腿。
We do have to cross our legs every time when Christian Dior advert comes on.
当新的参与者出现时，他们在现有文化中没有深厚的根基，会发生什么？
What happens when new players emerge, who don't have deep roots within the existing culture?
但当压力不断出现时，身体的反应更有可能是对我们有害而不是有益的。
But when stress is encountered continually, the body's reactions are more likely to be harmful than helpful to us.
在1971年5月5日，当部分船体框架被发现时，这一行动达到了高潮。
The climax to the operation came when, on 5 May 1971, part of the ship's frame was uncovered.
当情绪出现时，与其将其扼杀，不如关注它们，并试着理解情绪想要传递的信息。
When emotions arise, instead of stifling them, pay attention to them and try to understand the messages they are trying to deliver.
当每个梦想都能实现时，孩子们不会学到任何东西的价值，因为他们拥有了一切。
When every dream can come true, kids don't learn the value of anything because they have everything.
他们以自己的方式生活，激发了中世纪的想象力，刺激了15至16世纪的大发现时代。
They took on a life of their own and they inspired the medieval imagination, spurred on the age of discovery in the 15th and 16th centuries.
我们现在认为恐龙化石被发现时的姿势表明孵蛋的行为，也就是说，坐在蛋上直到蛋孵化。
Dinosaur fossils have been found in postures that we now believe to indicate brooding behavior, that is, sitting on the eggs until they hatch.
土著人开始画他们认为会在海边看到的船——我们很难想象当这些船真的出现时他们会怎么想。
The Aborigines began to draw ships which they would have seen along the coast—it's hard for us to imagine what they must have thought when these first began to appear.
有人说，当商业广播出现时，马可尼失去了优势，他认为收音机不可以也不应该用于无聊的目的。
There are some who say Marconi lost his edge when commercial broadcasting came along; he didn't see that radio could or should be used to frivolous ends.
20世纪80年代末，当它作为一种纯文本媒介出现时，它被视为一种追求知识而非快乐的工具。
When it emerged towards the end of the 1980s as a purely text-based medium, it was seen as a tool to pursue knowledge, not pleasure.
在积极的一方面，当我们注重培养这些事物，它就会在死者出现时，帮助我们更好地处理消极因素。
On the positive side, when we cultivate these things, it also helps us deal much better with the negative when dead arises.
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