当摄像机在执行它的神奇的职责时，你就要保持露齿笑，这实在是太让人难以想象了，于是，一种坚定而茫然的凝视成了常态。
The thought of holding a fixed grin as the camera performed its magical duties was too much to contemplate, and so a non-committal blank stare became the norm.
当他们到达山顶上的时候，雨夹雪已经变成了柔软的雪花。
By the time they reached the mountaintop, the sleet had changed to fluffy snow.
马良开始画母鸡，当他画完以后，画上的母鸡变成了一只真正的母鸡。
Ma Liang began to draw a hen, and as he did so, it changed into a real hen.
当大学不探讨不同学生群体的阶级优势和劣势，这就成了一个更大的问题。
And this becomes more of a problem when colleges don't talk about the class advantages and disadvantages of different groups of students.
几个月过去了，他们一直在玩耍，没有工作，当他们变成了小驴子，他就把他们带到市场上去卖。
When, after months of all play and no work, they became little donkeys, he sold them on the market place.
第二天，当他们回到洛基韦时，发现他们家附近已经成了废墟。
When they returned to Rockaway the next day, they found their neighbourhood in ruins.
当公司倒闭时，这些优点突然变成了缺点。
These virtues then suddenly become vices when the company fails.
当电子从云层底部涌向地面时，通道就开始形成了。
The formation of the channel is initiated when electrons surge from the cloud base toward the ground.
当著名的驴子皮诺乔出现在马戏场时，掌声变成了吼声。
The applause grew to a roar when Pinocchio, the famous Donkey, appeared in the circus ring.
当建筑物倒塌时，它形成了一个三角形，救了我们。
When the building fell down, it made a triangle, and it saved us.
一场暴风雪把甲板变成了冰封的薄板，当船倾斜并开始下沉时，数百个家庭滑入大海。
An ice storm had turned the decks into frozen sheets that sent hundreds of families sliding into the sea as the ship tilted and began to go down.
当工匠群体成员增加，小型的工艺组织就形成了。
When a group of craftsmen expands to include more members, a small craft organization is formed.
更重要的是，当他触摸面包和肉时，它们也变成了金子。
What's more, the bread and the meat were also turned into gold when he touched them.
当它们长到最大尺寸时，它们用尾部附着在树叶上，蛹就形成了。
When they reach full size, they attach to a leaf by their tail, and a pupa is formed.
当岩浆一次又一次地在同一地点从地下涌出时，就形成了盾状火山。
Shield volcanoes formed when magma comes out of the ground in the same spot over and over again.
虽然约翰很快就成功地完成了他的任务，但当他得知老板故意给他安排了一个难缠的客户时，他勃然大怒。
Although John completed his assignments quickly and successfully, he was furious when he learned that the boss had deliberately assigned him a difficult client.
令人惊奇的是，一个仅仅是可能有兴趣当领导人的女人，却因为她丈夫当官，自然而然地成了主席。
It is amazing how a woman who may have an interest in being a leader nevertheless automatically becomes a chairperson because of the official position of her husband.
当大陆上的冰开始融化时，两块冰原之间形成了一条无冰走廊，这一证据主要来自放射性碳测年法。
Evidence that an ice-free corridor between two ice sheets developed when the continental ice first began to melt came primarily from radiocarbon dating.
当海底火山将水下的岩石推到表面时，一个新的岛屿就形成了。
When an underwater volcano pushes submerged rock to the surface, a new island is created.
当皇帝骑上马与他的侍卫一起追捕马良的时候，马良画了一匹马，这匹马变成了真正的马。
When the king got on his horse and chased him with his guards, Ma Liang drew a horse and it changed into a real horse.
当手指接触一个表面时就形成了指纹。
当老师出去开会的时候，管理班级事务就成了班长的职责。
It is up to the monitor to manage the affairs of our class when the teacher goes out to attend meetings.
当她于1856年回到英国时，她成了一位民族英雄。
When she returned to England in 1856, she was a national heroine.
当遇到又高又壮的教练吉姆·格雷厄姆时，恐惧变成了敬畏。
Fear turned to awe when I met my coach, Jim Graham, a huge and strong guy.
当越来越多的人拥有一个学位时，拥有两个便成了明智之举。
When more and more of us have a degree, it makes sense to have two.
在冬天，当冰岛人完成了他们的日常工作，他们会有很多特殊的活动来度过漫长的黑夜。
In winter, when people in Iceland complete their daily work, they will have a lot of special activities to spend the long dark night.
“我也不能了。”皮诺乔叫道。当他无助地跌跌撞撞时，他的笑声变成了眼泪。
"I can't either," cried Pinocchio; and his laughter turned to tears as he stumbled about helplessly.
小天狼星摔倒好像用了很长时间：当他向后摔倒，通过了拱门上粗糙的帘子时，他的身体蜷成了一个优美的拱形。
It seemed to take Sirius an age to fall: his body curved in a graceful arc as he sank backward through the ragged veil hanging from the arch.
天文学家的理论是，当一个巨大的物体在其自身的引力作用下灾难性地收缩，只留下一个强大的引力场，且没有任何东西能逃脱时，黑洞就形成了。
Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it.
它主要通过地下茎传播；当根系统碎片或整个植物漂浮到一个区域并生根，或当种子漂浮到一个合适的区域并发芽时，菌落就形成了。
It spreads primarily by underground stems; colonies form when pieces of the root system or whole plants float into an area and take root or when seeds float into a suitable area and germinate.
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