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.
他以往的丑行被发现时，人们感到震惊。
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.
现时天气变化无常。
他们刚出现时，似乎没有恶意。
当其目标实现时，它就没用了。
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。
当她的晚餐同伴出现时，她拉了把椅子。
它们在天空里时现时隐。
当他想要的那个出现时，他还是把它扔掉了。
所以当这被第一次发现时，人们简直不敢相信。
So when this was first found, people literally would not believe it.
当问题出现时，你可以自己处理，而不用请专业人员。
When a problem appears, you can deal with it yourself without paying a professional.
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.
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?
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.
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